explain xkcd - User contributions [en]

3022: Making Tea

2024-12-10T09:50:09Z

172.71.154.38: /* Explanation */

{{comic
| number = 3022
| date = December 9, 2024
| title = Making Tea
| image = making_tea_2x.png
| imagesize = 690x291px
| noexpand = true
| titletext = No, of course we don't microwave the mug WITH the teabag in it. We microwave the teabag separately.
}}

==Explanation==
{{incomplete|Microwaved by a TEA-MAKING AUTOMATON - Do NOT delete this tag too soon.}}
Tea is exceptionally popular in the United Kingdom (although [https://www.bbc.co.uk/news/articles/c4gpll9l535o decreasingly so]). Virtually every home has an electric kettle as a standard appliance, if not a normal one and a cooker hob, with teapots and other related crockery being found in many cupboards, or even on a shelf in full display. In contrast, tea is less commonplace in the United States of America (Randall's native country) and owning separate devices for tea-making is probably far less common than having coffee-makers of various kinds. As a result, when Americans need a cup of boiled water — for tea or otherwise — it is considered normal to put the water in a microwave oven.

British people are stereotyped as taking genuine offense to microwaved water, believing it to be an objectively incorrect way to make tea. Randall mocks this stereotype through exaggeration, saying British people would be less offended by the theft of the {{w|Crown Jewels of the United Kingdom}} than they would be by a cup of microwaved water.

===Methods mentioned===
;Making it in a kettle
:Perhaps an intentional misnomer. Water may be ''boiled'' in a kettle, but the tea itself is made in a separate {{w|teapot}}, with loose or bagged tea-leaves, ready for pouring into any number of {{w|teacup}}s, {{w|mug}}s or {{w|vacuum flask|thermos flask}} as required. Alternatively, the water is poured directly from the kettle onto a teabag in a mug or cup — either with a teabag already waiting in it (typical for "{{w|Builder's tea}}", where it may remain for a long while, ''perhaps'' until being fished out by a spoon just before drinking) or into which the teabag will now be dipped (at the personal discretion of the recipient, to taste, thus fine-tuning the time it infuses).

;Boiling water in a pot, steeping in a mug
:As above, boiling water from the ''kettle'' can be poured straight into an individual mug. However, boiling the water in a pot (or more commonly in the UK, a 'pan') on the stove is considered inferior to the kettle.

;Making it in a chalice and ampulla stolen from the Crown Jewels
:The most un-British thing about this is the use of incorrect tea-ware. The precious stone chalice and gold ampulla are doubtful as being of suitable materials for British tea-making (as opposed to using cast iron, stainless steel, silver-plate, robust ceramics and/or fine china, for various stages of the process) and there'd definitely be some complaints that it does not taste like a proper cuppa. As a secondary consideration, some Brits would consider stealing the Crown Jewels a crime against the nation's own heritage. Though many may have considered it, and occasionally {{w|Thomas Blood#Theft of the Crown Jewels|attempted it}}, it would not be taken kindly by many others. And to do so to make tea would be just {{wiktionary|not cricket}}.

;Microwaving a mug
:As mentioned, considered acceptable and common in the US, and borderline heretical in the UK. Microwaving is particularly distrusted for making tea because of a perceived lack of control over the temperature of the water when applied to the teabag/leaves — either risking unwanted boiling of the tea if placed in the microwave, or the receptacle does not retain sufficient heat between the microwave and the tea being added. In addition, some Brits worry the microwave oven could generate superheated water that explodes in your face the moment it is disturbed (this is generally not a real danger, and applying a loose lid to prevent overboiling is more than enough to keep one safe).
:The title text continues with this theme, by reassuring us that the microwaved mug doesn't have a teabag in it (analogous to the 'boiling tea-kettle' version, together with new uncertainty about sudden nucleation of the water). Instead, it is separately microwaved. In typical Randall fashion, this is pure farce: there is no reason to microwave a teabag. Microwave ovens heat water molecules almost exclusively, and tealeaves (and bag) should normally be dry and would receive little to no heating. The wrongheadedness of this claim does little but provoke a skeptic's doubts about how utterly perverse this colonial variation on tea-making has become.

==Transcript==
:[A line chart is shown. Above the chart are, from top to bottom, a heading, a subheading, and an arrow pointing right with a label above. On the line there are four labeled tick marks, with the labels written beneath the line. A small curved line is going from each label to below their tick. The first two ticks are close together on the far left side of the graph, the third is approximately in the center, and the fourth is on the far right side of the graph.]
:<big>Ways of Making Tea</big>
:By how angry British people get when Americans do them
:More angry

:Making it in a kettle
:Boiling water in a pot, steeping in a mug
:Making it in a chalice and ampulla stolen from the Crown Jewels
:Microwaving a mug

{{comic discussion}}

[[Category:Charts]]
[[Category:Food]]
[[Category:Rankings]]

2948: Electric vs Gas

2024-06-21T09:38:46Z

172.71.154.38: /* Explanation */

{{comic
| number = 2948
| date = June 19, 2024
| title = Electric vs Gas
| image = electric_vs_gas_2x.png
| imagesize = 284x385px
| noexpand = true
| titletext = An idling gas engine may be annoyingly loud, but that's the price you pay for having WAY less torque available at a standstill.
}}

==Explanation==
{{incomplete|Created by a HYDROGEN INTERNAL COMBUSTION ENGINE RUNNING A GENERATOR. Do NOT delete this tag too soon.}}

{{w|Internal combustion engine|Internal combustion engines}} (ICEs) are the most common technology used to propel motor vehicles. In US vernacular, the most common motor fuel is known as "{{w|gasoline}}", or "gas" for short, leading to these engines being referred to as "gas engines". Gasoline is a product of petroleum refinement, leading to the name "petrol" being used in other dialects.

{{w|Traction motor|Electric motors}} would seem the more well-suited method for propelling a vehicle, and as early as 1885 were an actual form of motor car engine with which the fledgling internal combustion engine had to compete. Despite this early popularity, over most of the 20th century electric motors were sidelined in everyday car design, as supplying the electricity was considered to be impractical for most forms of transportation. Modern forms are rapidly rising in popularity, and now constitute 18% of all global vehicle sales.{{acn}} [[Randall]] has long been a strong proponent of electric vehicles.

In this strip, [[White Hat]] claims to be comparing the pros and cons of electric motors and gas engines. The joke is that every point he makes goes in favor of electric motors. Despite it being posed as a dilemma, it may be very clear which side of the debate White Hat is promoting. On the other hand, it may indicate that one of the things we might consider a pro in electric motors (the instantaneous power now available, exceeding that of many non-electric engines) he would consider a problem — perhaps more accurately, a problem with the ''drivers'' of such vehicles — recklessly using the enhanced capabilities to accelerate to high speeds at all opportunities, whether safe to do so or not.

The strip offers the following points in favor of electric motors:

* "Cleaner and more efficient". ICEs produce and vent harmful combustion products and toxic chemicals, while electric motors produce no emission byproducts at the point of use. The efficiency of both gas and electric motors vary, but the typical ICE vehicle in the US converts around 25% of available energy into motion, while the typical electric vehicle is in the neighborhood of 80%. Even when considering inefficiencies in the source production and transmission and storage and release of energy, battery-driven electric vehicles are generally more efficient than internal combustion propelled vehicles[https://www.factcheck.org/2024/02/electric-vehicles-contribute-fewer-emissions-than-gasoline-powered-cars-over-their-lifetimes/]. It should be noted that all of this refers to the motors only, and ignores how the fuel and electricity are produced, or the wider environmental impact of the vehicle.

* "More powerful". Electric motors are able to deliver a lot of power from a small motor ''if'' an ample energy supply is available, and can do so 'on demand', often far quicker than a fuel-powered engine that has to put its power through a gearbox in order to service a wide range of road velocities, from standstill to the eventual top speed. Due to battery limitations, short or partial runtime use cases (such as dragsters, hand tools, yard tools, toys and electric scooters) net the most benefit from the small size of a high-powered electric motor.

* "Annoyingly loud". ICEs, by their nature, produce significant noise. Despite noise attenuation measures such as mufflers, they contribute significantly to urban noise. Properly designed electric motors are nearly silent (even if the rest of the vehicle is not). In particular, {{w|blowoff valve|turbocharger blowoff valves}} make particular noises that are completely lacking in an all-electric vehicle being driven at a similar performance level. This might legitimately be considered a problem, though, when everyone is used to a rapidly approaching vehicle providing a very noisy warning of its approach. EV makers have sometimes added [https://www.businessinsider.com/electric-car-ev-fake-engine-sound-hyundai-dodge-toyota-2023-7 fake ICE noises] to appeal to older drivers, and in the U.S. and some other countries, EVs are required to have {{w|Electric_vehicle_warning_sounds|warning sounds}} at low speeds for pedestrian safety.

* "WAY less {{w|torque}} available at standstill". ICEs need to continually operate within a specific range of rotational speeds, which means that a complex system of {{w|transmission|transmission gearing}} is needed to convert this motion into the specific speeds needed at the wheels. When starting from a standstill, this means that torque must be applied to the wheels relatively gradually to avoid stalling the engine. In addition, when a vehicle is standing still, the motor is typically idling at (very) low speed and must be sped up before it produces significant acceleration. Electric motors, in contrast, generally produce their peak torque when at a standstill. This results in electric vehicles having significantly better acceleration and engine responsiveness. Again, this could cause a legitimate problem with drivers changing from ICE to electric motors, because the new cars accelerate more than the driver is used to and provide different feedback. The audible clues of gear changes, whether from automatic or manual systems, are part and parcel of what many people have grown up with and come to rely on in anticipating what might need paying attention to.

The strip offers no points in favor of internal combustion (gas) motors, even those framed as if they were such.

It should be noted that White Hat is deliberately confining his arguments to electric vs gas ''motors'' rather than electric or gas-powered ''vehicles''. Doing so ignores the basic reason why internal combustion vehicles have long dominated transportation in certain specific countries: hydrocarbon fuels are a very dense and fairly easy to handle form of energy ''storage''. Providing electrical power to a moving vehicle requires either that the vehicle remain in contact with a power line, like a train, a tramway, a subway does, or a high-capacity battery and the ability to recharge that battery in a reasonable amount of time. More popular in the USA is a hybrid system, where a combustion engine provides at least some of the power to an electric motor, which was impractical until comparatively recently. Other methods, such as hydrogen fuel cells (a form of "combustion" that can be used more directly to form electricity), have been proposed, but remain niche, due to various barriers to adoption, or experimental.

A more comprehensive comparison would include many more factors, both against and in favor of electric cars.

Issues raised with electric vehicles typically include:
* Higher cost of purchase (primarily due to the cost of batteries and, in the USA, now a 100% tariff on Chinese EVs), although partially offset by lower costs of operation
* Long charging times compared to refilling a gas tank (there are some approaches which mitigate this by operating either very high powered chargers or a battery swap model, rather than charging in-car, but these are not widely adopted)
* Relatively limited range ([https://ev-database.org/compare/electric-vehicle-longest-range 100-400 miles per charge] as of 2024)
* Shortened range in hot weather and significantly shortened range in cold weather (although ICE vehicles also have this problem)
* Limited charging infrastructure in some places (although ICE vehicles also have this problem)
* Higher vehicle weight, and resulting higher particulate emissions (from tires, but not brakes, because EVs use of regenerative braking reduces wear on their traditional brakes)
* Reliance on various mineral and metal extraction industries in the building of batteries
* Issues disposing of/recycling batteries at end of life
* Increased demand on electricity production
* At highway speeds, the noise of tires against the road is much louder than a properly muffled ICE, thus electric vehicles become nearly as loud as their ICE vehicle counterparts

Other real (or asserted) pros of electric cars are also not mentioned:
* Lower costs of operation (partially offset by higher costs of purchase)
* Can "fill" them at home or while parked without having to stay with them (partially negates the "long charging times" con)
* Higher reliability
* Lower carbon footprint, and reduced dependence on the fossil fuel industry

Advancing technologies, political policies, and economic realities are rapidly changing the relevance and seriousness of these points. The current adoption rate of EVs (well under 50%, even in California) may indicate that the general population thinks the cons still win (though to some extent this is a reflection of an 'installed base' of ICE vehicles already on the roads).

Future economic and political policies may make fueling and maintenance of gas-powered personal cars an issue. If, in 10 years, 100% of cars sold are electric, then after the average 12 year vehicle lifespan of fuel cars has ended it may be that legacy fuel stations are harder to find (and recharging stations easier) in comparison to the other type. At the 20-year mark, most gasoline-fueled cars will be gone and the economic value of providing ubiquitously available fuel to a dwindling number of cherished hold-out 'classic' vehicles will have forced the supply chains to pivot. Maintenance for such cars may become an art of the past and finding a specialized mechanic may be necessary (as, until recently, it would have been difficult to find an independent EV-qualified mechanic).

In the EU, the sale of new ICE cars is banned from 2035 in an effort to move to EVs, and other jurisdictions are adopting similar policies.

Especially in the United States, this topic is highly contentious for political, economic, engineering, and [https://en.wikipedia.org/wiki/Rolling_coal tribal] reasons (as a quick look at the edit history of this page will confirm).

==Trivia==
The etymology of "gasoline" is disputed: it may derive from "gas", or perhaps from the brand-name fuel "Cazeline" or "Cazelline" sold by a man called John Cassell; "Petrol" has also been a registered brand name for other businesses' motor-fuel products.

While ICE vehicles have, to date, proven more popular than electric equivalents, worldwide, bicycles have been outselling cars [https://www.bikeradar.com/features/bike-vs-car-the-sales-race|since at least WWII].

==Transcript==
:[White Hat, with his palm raised, is talking to Cueball.]
:White Hat: Electric motors and gas engines each have their pros and cons.
:White Hat: On one hand, electric motors are cleaner and more efficient. On the other hand, electric motors are more powerful.
:White Hat: So it's hard to say which is better overall.

{{comic discussion}}

[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Cueball]]
[[Category:Engineering]]
[[Category:Climate change]]

2940: Modes of Transportation

2024-06-03T06:44:11Z

172.71.154.38: /* Explanation */

{{comic
| number = 2940
| date = May 31, 2024
| title = Modes of Transportation
| image = modes_of_transportation_2x.png
| imagesize = 510x518px
| noexpand = true
| titletext = My bold criticism might anger the hot air balloon people, which would be a real concern if any of them lived along a very narrow line directly upwind of me.
}}

==Explanation==
{{incomplete|Created by a Transportationally convenient but insidiously dangerous robotic car - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

Randall's chart compares different modes of transportation of convenience and danger. At the top (high in convenience and low in danger) are cars and trains, as these are both fast moving but heavy vehicles that many millions of dollars have been spent to make them safer. Motorcycles are at the same convenience level however are rated much more dangerous as careless drivers (of cars) can easily hit a motorcycle and cause extreme harm. Much lower on the convenient scale are things like unicycles and skis, which both aren't very fast or easy way's to travel and are relatively easy to fall on. However, rated least on convenience and highest on danger is the hot air balloon.

Because a hot air balloon is rated so poorly, if an optimization algorithm considers it the optimal mode of transportation, it must be the result of a sign error (e.g. having a minus sign where a plus sign is supposed to be, or vice versa), making the algorithm optimize for the opposite result by mistake. Presumably, modes of transportation similar to hot air balloons (like zeppelins and blimps) are left off of the chart to increase the gap for comedic effect. This comic is the second comic in a row to feature an algorithm.

The title text makes a joke that if an angry hot air balloon enthusiast disagrees with the ranking, they will have a difficult time getting to Randall's house with their preferred mode of transportation. In reality, hot air balloons have some freedom to choose their direction of travel, since by controlling their altitude they can access different wind directions at different heights. Randall should, therefore, be concerned about hot air balloonists who live within a wedge spanned by the various wind directions accessible on a given day. In principle, if the weather conditions are favorable, this could cover every direction from Randall's house. The phrase "hot air balloon people" is reminiscent of "autogyro people" from the title text of [[1972: Autogyros]].

Curiously, the comic includes most common forms of transport, and a number of less common ones, but omits examples such as buses (a mass transit solution arguably more convenient than trains). It is not clear if this is an error, or a deliberate choice to maintain the comic's layout and presentation.

{| class="wikitable sortable"
|-
! Transportation !! Description !! Convenience !! Danger !! Zone
|-
|{{w|Train}}s
|Mass transit on rails Very convenient ''if'' scheduled services along established routes are well suited for your journey. Many people can make journeys in complete safely on dedicated tracks (Incidents can effect many people at once, but are comparatively rare.)
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|{{w|Airliner}}s
|Mass transit aircraft As long as there are convenient airports, and operators. Air travel is ''very'' safe, accounting for the number of miles traveled and passengers carried. (Accidents can be catastrophic both to the passengers/crew and potentially anybody on the ground, however.)
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|{{w|Car}}s
|Motorised road vehicle Most common method of long distance travel used to get anywhere from a mile to 200 miles. It is mostly safe since it is the most common form of travel, quite a lot of time and money is spend to make it safer that safer.
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|Scooters
|Either: 
*{{w|Kick scooter}} - ...
*{{w|Motorized scooter|Engine-powered scooter}} - ...
*{{w|Scooter (motorcycle)|Low powered motorbike/moped}} - ...
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|{{w|Bicycle}}s
|Human-powered (or {{w|Electric bicycle|mostly so}}) two-wheeled road vehicle ...
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|{{w|Boat}}s
|Watercraft of various types ...
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|{{w|Walking}}
|Personal bipedal ambulation 
|data-sort-value=""|
|data-sort-value=""|
|Practicality
|-
|{{w|Motorcycle}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Helicopter}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Light aircraft}}
|In the United States, the category of [https://www.faa.gov/aircraft/air_cert/design_approvals/small_airplanes/categories small aircraft] covers a variety of aircraft certified to weigh 19,000 pounds (8618 kg) or less at takeoff. Maximum allowed weight varies by specific category.
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Go-kart}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Skateboard}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Inline skates|Rollerblades}}
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Ski}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Unicycle}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Sled}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Bumper Cars}}
|...
|data-sort-value=""|
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Hot Air Balloon}}s
|...
|data-sort-value=""|
|data-sort-value=""|
|?????
|}

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[A chart is shown, where the Y axis is labeled "Convenient for travel" and has an arrow pointing up and the X axis is labeled "Dangerous" and has an arrow pointing right.]
:[The following modes are shown in the "Zone of practicality" (a large irregular area fitting in to the top left corner of the chart), highlighted with a gray background, starting with the first few bunched at highest convenience, :]
:Trains [very convenient, very safe]
:Airliners
:Cars
:Scooters [the most dangerous of this set, at medium-low danger]
:Bicycles
:Boats [medium-high convenience, a slight amount of danger]
:Walking [the least convienient, at roughly half, and lowest danger of this set]
:[The following modes are shown in the "Zone of specialty and recreational vehicles" (a large irregular swathe from the top right to the bottom left, not quite touching the prior zone), highlighted with a gray background, the nodes spread in rough order from high convenience/danger to low convenience/danger:]
:Motorcycles [highly convenient, nearly maximum danger]
:Helicopters [not quite fully convenient, most danger]
:Light aircraft
:Go karts
:Skateboards
:Rollerblades
:Skis
:Unicycles
:Sleds
:Bumper cars [lowest convenience and lowest danger item]
:[The following is labeled "?????" (in the bottom right corner), and has a gray background all to itself in a small blob notably distant from the nearest other group:]
:Hot air balloons [placed as almost the least convenient and most dangerous, of all labels]

:[Caption below the panel:]
:Hot air balloons are the optimal mode of transportation, if your optimization algorithm has a sign error.

{{comic discussion}}

[[Category:Charts]]

2739: Data Quality

2023-02-17T21:11:37Z

172.71.154.38: /* Explanation */ this has been addressed; please use the talk page instead of the maintenance template

{{comic
| number = 2739
| date = February 17, 2023
| title = Data Quality
| image = data_quality_2x.png
| imagesize = 671x211px
| noexpand = true
| titletext = [exclamation about how cute your cat is] -> [last 4 digits of your cat's chip ID] -> [your cat's full chip ID] -> [a drawing of your cat] -> [photo of your cat] -> [clone of your cat] -> [your actual cat] -> [my better cat]
}}

==Explanation==
{{incomplete|Created by a SUPERIOR FELINE - Do NOT delete this tag too soon.}}

Data are transferred in bits, and {{w|data loss}} is the process by which some of these bits are lost or otherwise unfavourably altered during data transport. Data can also be compressed to make transmission and/or storage more efficient; some {{w|compression algorithms}} discard some data to improve the compression (this can be acceptable in audio or visual data, since the difference may be hard for humans to perceive).

This comic shows a chart in the form of a line, moving in increasing quality from most lossy to most lossless. However, the highest quality, "better data", is using a different sense of the term "quality". In the context of data transmission or compression, it refers to how accurately the result represents the original. But in this case, he's referring to its more general excellence.

The title text uses your cat as an example of this range of losses (or, in the case of the latter reaches of the graph, gains) in the data. The most lossy is an exclamation about how cute your cat is, which is ephemeral and obviously carries very little significance in terms of actually providing specific, transferrable information about your cat. The example then progresses into your cat's chip ID; presumably your cat has been microchipped, and between the last four digits (commonly used in sensitive information as an identifier without revealing the full number) or the entire chip ID, provides a still-uninformative yet slightly improved way of identifying your cat. A drawing of your cat and a photo of your cat would portray the cat reasonably well, while a clone of your cat and (of course) your actual cat would be the best way of gaining data about your cat. However, as in the actual comic, the final, most lossless (in this case, with the most gain) form of data transfer has nothing to do with your cat, but is simply Randall's better cat. This is apparently made out by Randall to be the pinnacle of cat data.

==Transcript==
:[A line chart is shown with eight unevenly-spaced ticks each one with a label beneath the line. Above the middle of the line there is a dotted vertical line with a word on either side of this divider. Above the chart there is a big caption with an arrow pointing right beneath it.]
:<big>Data Quality</big>
:Lossy ┊ Lossless

:[Labels to the left of the dotted line from left to right:]
:Someone who once saw the data describing it at a party
:Bloom filter
:Hash table
:JPEG, GIF MPEG

:[Labels to the right of the dotted line from left to right:]
:PNG, ZIP, TIFF, WAV, Raw data
:Raw data + parity bits for error detection
:Raw data + parity bits for error ''correction''
:Better data

{{comic discussion}}

[[Category:Charts]]
[[Category:Cats]]

2722: Etymonline

2023-01-10T22:37:45Z

172.71.154.38: /* Explanation */

{{comic
| number = 2722
| date = January 9, 2023
| title = Etymonline
| image = etymonline_2x.png
| imagesize = 458x280px
| noexpand = true
| titletext = NOTE TO FUTURE ETYMONLINGUISTS: Our best guess is that 'blimp' is onomatopoeia. The 'B-Limp' thing is a folk etymology.
}}

==Explanation==
{{incomplete|Created by an ETYMONLINGUIST - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

This comic appears to be an entry from a dictionary posted in the far future (at least the year 2384 based on the textual reference). The entry defines the term "etymonline" in a way that makes it clear that it has simply supplanted the word "etymology" in the intervening centuries. This is a reference to the internet service known as [https://www.etymonline.com/ Etymonline] or the Online Etymology Dictionary, and implies that Etymonline as a source became synonymous with the concept of etymology. This may have been because Etymonline grew into such a comprehensive and reputable source that it truly deserved the all-encompassing identification with the concept of etymology; alternatively, humans' efficiency of language removed the original term in favor of the name for the tool they used when they needed to learn a word's origin. All we know is that the origin of the "modern" term is simply cited as a modification of a more archaic English form, without any mention of the digital resource. This is a mild failure on the part of the dictionary entry, since the suffix "online" should at least have been noted as the modifier resulting in the current form, even if a discussion of the specific internet service was not relevant in the entry, unless the very concept of "online" has been so superseded by whatever its successors or usurpers might have become that it has been even more lost to common, or indeed academic, knowledge.

The title text plays with this (replacing "etymologist" with the derived term "etymonlinguist"). It is a comment from some present-day scholar attempting to communicate with the author of the futuristic entry by clarifying what they know about the etymology of the word "blimp". The comment references two theories of the etymology (that it is simply onomatopoeia or that it was constructed from the phrase "Type B - Limp") and rejects the latter as a folk etymology (consistent with {{wiktionary|blimp|the explanation}} on Wiktionary). It is interesting to note that the current [https://www.etymonline.com/word/blimp Etymonline entry] only lists the B-Limp origin and does not mention onomatopoeia, though it does at least acknowledge that the origin is "obscure".

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

[A picture of a dictionary definition that is askew in the frame to imply that it is printed or written on physical paper rather than a digital resource.]

'''etymonline''' (n) et・y・mon・line /,ɛt.əmɒn'lain/
The history and derivation of a word. Altered form of English ''etymology'', from Old French ''ethimologie'', from Latin ''etymologia''. Quotation: "Before it came to refer to Jupiter's sky-cities, the term 'blimp' was used for 20th century Earth airships, but its etymonline before that is unknown." –''Jovian Blimps: A History'' (2384)

[Caption below comic]
Ironically, the popularity of Etymonline eventually caused the loss of the word "etymology" from English.

{{comic discussion}}
[[Category:Language]]
[[Category:Comics with lowercase text]]

2719: Hydrogen Isotopes

2023-01-06T09:10:46Z

172.71.154.38: /* Explanation */ same sentence

{{comic
| number = 2719
| date = January 2, 2023
| title = Hydrogen Isotopes
| image = hydrogen_isotopes_2x.png
| imagesize = 442x250px
| noexpand = true
| titletext = Oops, All Neutrons is also known as Neutral Quadrium, Nydnonen, and Goth Tritium.
}}

==Explanation==
{{incomplete|Created by a BREAK ROOM DE BROGLIE MICROWAVE USER. Do NOT delete this tag too soon.}}

{{W|Hydrogen}} is the simplest of the chemical atoms, usually consisting of an electron orbiting a lone proton, but with two other naturally occurring {{w|isotope}}s. This comic shows real and humorously fictional forms of hydrogen, generally depicted according to the {{w|Discovery of the neutron#Proton–neutron model of the nucleus|Chadwick model}} of the atom; see [[2100: Models of the Atom]] for details.

{| class="wikitable"
! "Isotope"
! Real?
! Description
|-
|Hydrogen
|Yes
|Hydrogen-1 is the most common isotope of hydrogen, with one proton and one electron, commonly shown with the electron orbiting the central proton. It is also occasionally known as protium.
|-
|Deuterium
|Yes
|{{w|Deuterium}} is the second most common isotope of hydrogen, with one electron and both a neutron and proton in its nucleus. About one of every 6,760 hydrogen atoms in seawater is deuterium. Its chemical symbol is D, or [[2614: 2|2H]], and it's also called heavy hydrogen or hydrogen-2.
|-
|Tritium
|Yes
|{{w|Tritium}} is the third most common isotope of hydrogen, with an electron orbiting a nucleus of one proton and two neutrons to give it an atomic mass of about three {{w|Dalton (unit)|daltons}}. It is radioactive with a half-life of about twelve years and is very rare (but not as rare as unbound "instant hydrogen" neutrons). It can also be designated as hydrogen-3, with the symbol T or, more often, 3H.
|-
|Ium
|Only in the lab
|This is a free electron orbiting around nothing. Following the naming of the heavier hydrogen isotopes, where a prefix designating the number of {{w|nucleons}} is followed by the suffix "-ium", the lack of a nucleus is designated here by the absence of a prefix. A free electron will not circle around nothing but ''will'' react to electromagnetic fields. A {{w|Penning trap}} can confine electrons to move in circles.
|-
|Wheelium
|No
|This fictional form consists of a proton, electron and neutron orbiting around nothing, giving the appearance of all being stuck on a wheel rim. The neutron could bind to the proton, but will more likely {{w|Elastic_scattering#Nuclear particle physics|elastically scatter}} away.
|-
|Instant hydrogen (ready in 15 minutes)
|Yes, but rare[https://radioactivity.eu.com/phenomenon/neutronic_radiation]
|This is just a single neutron. An unbound neutron will decay into a proton, an electron and an antineutrino, with a mean lifetime of just under fifteen minutes. The proton and electron ''can'' form into a hydrogen atom, but that only happens [https://van.physics.illinois.edu/ask/listing/1207 about four times in a million]. The name is likely a reference to "instant" food, such as noodles, which are reduced for convenience and can be quickly reconstituted when required.
|-
|Hydrogen (maximum strength)
|No
|This fictional isotope consists of an electron, a proton, and what appear to be at least 14 neutrons. It can not be created by natural or artificial means,{{citation needed}} but if it was, it would immediately decay by {{w|Nuclear drip line|dripping}} most all of the neutons away, producing a large amount of energy. "Maximum strength" may be a reference to over-the-counter medicines that contain the largest quantity of active ingredients permitted.
|-
|Oops, All Neutrons
|Extremely unlikely
|This fictional form consists of four neutrons, with one orbiting around a group of three. As the existence of {{w|tetraneutron|tetraneutrons}} is still uncertain, their possible configurations are unknown, but the depicted configuration is very unlikely given the characteristics of fundamental forces. The name is likely a reference to an American breakfast cereal called {{w|Cap'n Crunch#Variations|Oops! All Berries}}, which has also been referenced in [[2256]].
|}

The title text provides three other names for Oops, All Neutrons:
# "Neutral Quadrium": {{w|Isotopes_of_hydrogen#Hydrogen-4|Quadrium}} is the extremely rare artificial isotope hydrogen-4, with a proton and three neutrons.[https://www.chem.ccu.edu.tw/~hu/Web_Lib/articles/Muonium+H2_Science_2011.pdf][https://www.lenr-canr.org/acrobat/GodesRcontrolled.pdf] The proton and electron have been replaced with neutrons.
# "Nydnonen" is the word "hydrogen" with three consonants replaced by the letter 'n' so that it has four of them, representing the four neutrons.
# "Goth Tritium": All the particles in the depiction are black, resembling typical {{w|gothic fashion}}, and in the same configuration as the particles of tritium.

==Transcript==
:[Eight drawings of different versions of hydrogen atoms are shown. They are arranged in two rows of four. The depictions use the planetary model version with for instance a negative electron (with a "-" written inside a small circle) orbiting a positive proton (with a "+" written inside a larger circle) and a black neutron depicted as a circle of the same size as the neutron, as in the second atom - Deuterium. Each has a label underneath. Here, they are listed in reading order:]
:[An electron orbiting a proton:]
:Hydrogen

:[An electron orbiting a proton connected with a neutron:]
:Deuterium

:[An electron orbiting a proton connected with two neutrons, so that they form a triangle:]
:Tritium

:[An electron orbiting nothing:]
:Ium

:[An electron, a proton and a neutron placed equidistant from each other on the same circular orbit around nothing:]
:Wheelium

:[A single neutron:]
:Instant Hydrogen (ready in 15 minutes)

:[An electron orbiting a proton connected with many neutrons, 13 visible with six touching the proton which are in front. Four more are close to those six and mostly shown and then three are only just visible behind the others. Looking closely there are also two smaller dots near the edge indicating at least two more, for 15 that can be seen. And several more would be behind the visible neutrons if this forms a spherical shape. The electron's orbit just barely goes around the outer neutrons:]
:Hydrogen (maximum strength)

:[Four neutrons, arranged like the particles in Tritium but with a neutron orbiting a triangle of neutrons.]
:Oops, All Neutrons

{{comic discussion}}

[[Category:Charts]]
[[Category:Physics]]
[[Category:Chemistry]]

2719: Hydrogen Isotopes

2023-01-04T08:30:38Z

172.71.154.38: /* Explanation */ avoid repeating preposition

{{comic
| number = 2719
| date = January 2, 2023
| title = Hydrogen Isotopes
| image = hydrogen_isotopes_2x.png
| imagesize = 442x250px
| noexpand = true
| titletext = Oops, All Neutrons is also known as Neutral Quadrium, Nydnonen, and Goth Tritium.
}}

==Explanation==
{{incomplete|Created by a BREAK ROOM DE BROGLIE MICROWAVE USER. Do NOT delete this tag too soon.}}

{{W|Hydrogen}} is the simplest of the chemical atoms, usually consisting of an electron orbiting a lone proton, but with two other naturally occuring {{w|isotope}}s. This comic shows real and humorously fictional forms of hydrogen, generally depicted according the {{w|Discovery of the neutron#Proton–neutron model of the nucleus|Chadwick model}} of the atom; see [[2100: Models of the Atom]] for details.

{| class="wikitable"
! "Isotope"
! Real?
! Description
|-
|Hydrogen
|Yes
|Hydrogen-1 is the most common isotope of hydrogen, with one proton and one electron, shown with the electron orbiting the proton. It is also known as protium.
|-
|Deuterium
|Yes
|{{w|Deuterium}} is the second most common isotope of hydrogen, with one electron and both a neutron and proton in its nucleus. About one of every 6,760 hydrogen atoms in seawater is deuterium.
|-
|Tritium
|Yes
|{{w|Tritium}} is the third most common isotope of hydrogen, with one electron and a nucleus of one proton and two neutrons, for an atomic mass of about three {{w|Dalton (unit)|daltons}}. It is radioactive with a half-life of about twelve years, and is very rare (but not as rare as unbound "instant hydrogen" neutrons.)
|-
|Ium
|Not as shown
|This is depicted as an electron orbiting around nothing. Heavier hydrogen isotopes are named from a prefix designating the number of {{w|nucleons}} followed by the suffix "-ium" (which is also {{w|systematic element name|used to name newly discovered elements}} before they are given a proper name, e.g. {{w|unununium}} for element 111) so no nucleus is designated here with no prefix. A free electron will not circle around nothing, but instead will gain momentum towards positive and away from negative electromagnetic field potentials. At very high densities, free electron momentum is also influenced by {{w|electron degeneracy pressure}} but it doesn't result in circular motion either.
|-
|Wheelium
|No
|This fictional form consists of a proton, electron, and neutron orbiting around nothing, shaped similarly to a wheel. The neutron could bind to the proton, but will more likely {{w|Elastic_scattering#Nuclear particle physics|elastically scatter}} away.
|-
|Instant hydrogen (ready in 15 minutes)
|Yes, but rare
|This is just a single neutron. An unbound neutron will decay into a proton, an electron, and an antineutrino, with a mean lifetime of just under fifteen minutes. The proton and electron ''can'' form into a hydrogen atom, but that [https://van.physics.illinois.edu/ask/listing/1207 only happens about four times in a million.] The name is likely a reference to "instant" food such as noodles which are reduced for convenience and can be quickly reconstituted.
|-
|Hydrogen (maximum strength)
|No
|This fictional isotope consists of a proton, an electron, and what appear to be at least 14 neutrons. This isotope's proton would not be bound to all the neutrons. It would immediately decay by {{w|Nuclear drip line|dripping}} most all of them away, producing a large amount of energy. "Maximum strength" may be a reference to over-the-counter medicines containing the largest quantity of active ingredients permitted.
|-
|Oops, All Neutrons
|Maybe
|This fictional form consists of four neutrons, a {{w|tetraneutron}}, with one orbiting around a group of three. The name is likely a reference to an American breakfast cereal called {{w|Cap'n Crunch#Variations|Oops! All Berries}}.

The title text provides three other names: 1. "Neutral Quadrium": Quadrium is an extremely rare artificial isotope of hydrogen with a proton and three neutrons.[https://www.chem.ccu.edu.tw/~hu/Web_Lib/articles/Muonium+H2_Science_2011.pdf][https://www.lenr-canr.org/acrobat/GodesRcontrolled.pdf] The proton and electron have been replaced with neutrons. 2. "Nydnonen" is the word "hydrogen" with three consonants replaced by the letter 'n' so it has four of them representing the four neutrons. 3. "Goth Tritium": All the particles in the depiction are black, resembling typical {{w|gothic fashion}}, and in the same configuration as the particles of tritium.
|}

{{notice2|The Mountain View, California Public Library is hosting an online chat with [[Randall Munroe]] Tuesday, January 31 at 11am Pacific. [https://libraryc.org/mountainviewlibrary/22032 Register here to send your question(s) to the moderators.]|image=Crystal Project Agt announcements.png}} 

==Transcript==
:[Eight drawings of different versions of hydrogen atoms are shown. They are arranged in two rows of four. The depictions use the planetary model version with for instance a negative electron (with a "-" written inside a small circle) orbiting a positive proton (with a "+" written inside a larger circle) and a black neutron depicted as a circle of the same size as the neutron, as in the second atom - Deuterium. Each has a label underneath. Here, they are listed in reading order:]
:[An electron orbiting a proton:]
:Hydrogen

:[An electron orbiting a proton connected with a neutron:]
:Deuterium

:[An electron orbiting a proton connected with two neutrons, so they form a triangle:]
:Tritium

:[An electron orbiting nothing:]
:Ium

:[An electron a proton and a neutron all orbiting on the same circle around nothing. They are placed equidistant from each other forming a large triangle:]
:Wheelium

:[A single neutron:]
:Instant Hydrogen (ready in 15 minutes)

:[An electron orbiting a proton connected with many neutrons, 13 visible with six touching the proton which are in front. Four more are close to those six and mostly shown and then three are only just visible behind the others. Looking closely there are also two smaller dots near the edge indicating at least two more, for 15 that can be seen. And several more would be behind the visible neutrons if this forms a spherical shape. The electrons orbit just barely goes around the outer neutrons:]
:Hydrogen (maximum strength)

:[Four neutrons arranged like the particles in Tritium with a neutron orbiting a triangle of neutrons.]
:Oops, all neutrons

{{comic discussion}}

[[Category:Charts]]
[[Category:Physics]]
[[Category:Chemistry]]

Talk:2719: Hydrogen Isotopes

2023-01-04T05:08:09Z

172.71.154.38: reply etc

This shows as a 404 on xkcd.com but in my RSS feed i can see the comic
: Works for me. [[Special:Contributions/172.69.34.9|172.69.34.9]] 02:25, 3 January 2023 (UTC)
::works for me now too but it didnt before
::: It works on m.xkcd.com and on the homepage of xckd, but the direct link gives me a 404. Various services such as the Wayback Machine show it as loading though. Could be a bad cache on some service. [[Special:Contributions/162.158.63.86|162.158.63.86]] 02:37, 3 January 2023 (UTC)

Could someone add an explanation of Nydnonen? I don't get it and it's google proof [[Special:Contributions/172.71.210.209|172.71.210.209]] 05:04, 3 January 2023 (UTC)Benzodiakanine
: Nothing. Was hopeful about {{w|List of Greek and Latin roots in English/N}} but nope. Tried stemming on all the Wiktionaries too. [[Special:Contributions/172.71.158.91|172.71.158.91]] 05:28, 3 January 2023 (UTC)
::Kudos to whomever figured it out, lol! [[Special:Contributions/172.71.158.231|172.71.158.231]] 08:02, 3 January 2023 (UTC)
:::Seems someone already did. There are four N's in that word replacing three of the consonant in Hydrogen so there are now four Ns one for each of the four neutrons in Nydnonen. ;-) --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:10, 3 January 2023 (UTC)

Are these to scale? I recently read that the Helium is smaller in terms of measured atomic radius than the Hydrogen. Possibly this is true of Deuterium as well? [[Special:Contributions/172.70.85.45|172.70.85.45]] 06:50, 3 January 2023 (UTC)
:They are almost the same size but it depends on temperature: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.200800063 [[Special:Contributions/162.158.90.153|162.158.90.153]] 08:00, 3 January 2023 (UTC)
::Is the reason Helium is smaller not that there are double the positive charge which the electrons thus orbit in a lower orbit (I know this is not the correct in reality with the orbit). But if true then Deuterium would not have this effect as it is not the weight but the charge that changes the orbit. And Deuterium has the same charge as Hydrogen as does Tritium. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:10, 3 January 2023 (UTC)

Is "oops all neutrons" distinct from Neutronium, which is also all neutrons? [[Special:Contributions/172.70.100.131|172.70.100.131]] 07:38, 3 January 2023 (UTC)
:Neutronium is ultra-dense and bound by gravity, with a minimum of about 1.2x1058 neutrons in a 40 kilometer diameter sphere. [[Special:Contributions/162.158.90.153|162.158.90.153]] 08:00, 3 January 2023 (UTC)
::Well actually a {{w|neutron star}} is only 10 km in radius (20 km in diameter) according to Wikipedia. And it is 1057 neutrons acording to this [https://www.astronomy.ohio-state.edu/ryden.1/ast162_5/notes21.html lecture on Neutron Stars]. {{w|Neutronium}} was actually used as a name for neutrons without protons and suggested to be placed as number 0 on the periodical table. But is has also been used as a name for the matter in the center of neutron stars, but usually not in scientific papers! There it is called degenerate matter. The wiki article mentions how a single neutron decays to proton/electron/neutrino in 15 minutes. It also mentions that two neutrons could form for very short periods in nuclear decay. An then mentions that more than two neutrons together is not likely to exist. Specifically mentioning the three from Randall's Oops particle as not being stable for even the shortest of times. Of course a neutron would also not be able to orbit a group of neutrons. But even the three at the center is impossible. More neutrons together would be isotopes of number 0 element... --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:22, 3 January 2023 (UTC)
::: My bad memory; thanks. [[Special:Contributions/172.71.154.38|172.71.154.38]] 05:08, 4 January 2023 (UTC)

I think "Maximum Strength" is a reference to medicines marketed as such - in particular brands of Ibuprofen "Maximum Strength Tablets". --[[Special:Contributions/172.69.79.132|172.69.79.132]] 14:59, 3 January 2023 (UTC)
: Yes - typically meaning that it contains far more of whatever its active ingredient is than is necessary to be efficacious.[[Special:Contributions/172.70.91.128|172.70.91.128]] 15:54, 3 January 2023 (UTC)

Considering that Deuterium is derived from Greek and Tritium works in both Greek and Latin, wouldn't the correct name for ⁴H be Tetartium?
:Tetrium maybe? Tetraium? [[Special:Contributions/172.71.154.38|172.71.154.38]] 05:08, 4 January 2023 (UTC)

Is it just me or have the recaptchas gotten much more difficult over the past week, to the point of frequently rejecting correct responses (i.e. in red)? [[Special:Contributions/172.71.154.38|172.71.154.38]] 05:08, 4 January 2023 (UTC)

2719: Hydrogen Isotopes

2023-01-03T07:26:37Z

172.71.154.38: /* Explanation */ whitespace

2717: L6 Lagrange Point

2022-12-28T07:39:52Z

172.71.154.38: /* Explanation */ subscripts

{{comic
| number = 2717
| date = December 27, 2022
| title = L6 Lagrange Point
| image = l6_lagrange_point_2x.png
| imagesize = 399x400px
| noexpand = true
| titletext = It's difficult to orbit L6 stably due to gravitational perturbation from Akron and Toledo.
}}

==Explanation==
{{incomplete|Created by a LANDED LAGRANGE POINT - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In celestial mechanics, the {{w|Lagrange point}}s are points of equilibrium for small-mass objects under the influence of two massive orbiting bodies. Or in simpler terms, positions in space where objects can stay in the same position relative to the defining bodies. The L1, L2, and L3 points are unstable, as any drifting off the point (e.g. due to the gravity of other bodies) might quickly increase the tendency to depart the area. The L4 and L5 points can actually retain objects stably over long periods, resulting in the Sun-Jupiter L4 and L5 points capturing the {{w|Trojan (celestial_body)|Trojan Asteroids}}.

There are five traditional Lagrange points, two spaced on the same orbital path as the original object (in this case Earth), and three more colinear with the Earth and the body it orbits (the Sun). Randall claims that a sixth Lagrange point has been discovered outside of {{w|Cleveland}}, {{w|Ohio}}. This is pretty obviously farcical, as this would be part of the Earth and thus not gravitationally balanced between Earth and the Sun, and the joke [https://tvtropes.org/pmwiki/pmwiki.php/Main/PlaceWorseThanDeath plays on Cleveland's reputation as a strange place]. The joke is that there is a different type of place named Lagrange: {{w|LaGrange,_Ohio|Lagrange, OH}} is a small (population 2,103) village outside Cleveland ([https://www.google.com/maps/place/Lagrange,+OH+44050/ map].)

The title text mentions {{w|Akron}} and {{w|Toledo,_Ohio|Toledo}}, two other large cities in Ohio. It says that their gravitational influence is the reason why orbits around the Cleveland L6 are unstable.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:Grey on white diagram of the Earth orbiting the Sun, not to scale. Earth is depicted as a circle with pale grey continents on darker grey seas, and shows a view from above the North Pole without any Arctic ice. The sun is drawn surrounded by radially symmetrical exaggerated wave pattern.
:Also in grey, approximate locations of Lagrange points 1 to 5 are marked with dots and labels: "L1" "L2" "L3" "L4" "L5".
:In black, a point on the Earth's surface within the boundary of a continent that could be North America. Also in black, an arrow pointing towards the point, and the label "L6".
:Caption: "Huge space news: Astronomers have discovered a new Lagrange point just outside Cleveland."

{{comic discussion}}

[[Category:Astronomy]]
[[Category:Science]]

Talk:2716: Game Night Ordering

2022-12-26T23:39:08Z

172.71.154.38: Reply

Should we create a category for comics about game night? It can contain at least this and https://xkcd.com/2486/. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 22:32, 26 December 2022 (UTC)
:I'm not going to oppose it, but keep in mind that it would overlap with [[:Category:Board games]]. --[[Special:Contributions/172.70.178.48|172.70.178.48]] 22:50, 26 December 2022 (UTC)
::We absolutely need a general [[:Category:Games]] because we have e.g. roleplaying games under Board games. Does anyone know how to edit in a superclass category? The last time I ever did anything sophisticated with Mediawiki categories was like 2008. [[Special:Contributions/172.71.154.38|172.71.154.38]] 23:39, 26 December 2022 (UTC)

The rules would seem to be similar to the card game Cheat (or, at least, the version we used to play). Using an ordinary wholly-dealt pack of cards (for any number of players), it was a "blind bid and discard" game whereby each player has to state "<one to four> <card value>s" (or more than four, with merged packs, each of which might be whole or partial) was going on the discard pile, such that the card value was within one (-1, =, +1, with standard wrapping ...>10>J>Q>K>A>2>...) of the prior stated discard. And ''something'' had to be discarded, whether or not the player could technically do so. The forfeit for not continuing play ''or'' challenging, within a generally acceptable thinking time, was the same for either being successfully challenged (you stated you put down two threes, but on checking the dump pile you discarded two sevens) or for the person who wrongly challenged... to pick up the discard pile and be so much further from the ultimate goal of ending up with zero cards (the first the winner, optionally the second, third, etc to do so to earn further ranks just for the sake of continuing/last-ranking the one who ended up as the only one still with cards). - I presume this game just applies the same penalty (buying the food) to anyone who dithers over whether to challenge anything or 'play their own hand'. There doesn't need to be anything more complicated to it. Unless there's also an 'empty hand' winning state, that I can't discern from the brief discourse given in the comic. But it seems more geared to finding the eventual 'loser' (the one who pays up) than any single beneficiary. [[Special:Contributions/162.158.34.230|162.158.34.230]] 23:17, 26 December 2022 (UTC)
:If there is a link for Cheat you should add it. [[Special:Contributions/172.70.206.150|172.70.206.150]] 23:20, 26 December 2022 (UTC)
::Well, I think there's far too many variations... Though, surprisingly, it does look like {{w|Cheat (game)}} actually describes ''my'' learnt version quite well. But I don't think I see any 'time out' penalties mentioned there, and that was the key part of the "play or challenge, don't dither, or you lose" bit to my (sorry, rather long) description above... [[Special:Contributions/162.158.34.230|162.158.34.230]] 23:27, 26 December 2022 (UTC)
::(Plus there's the inverted "loser finder" rather than "winner finder" primary nature of the gameplay. It makes the methodology of play a bit too different.) [[Special:Contributions/162.158.34.231|162.158.34.231]] 23:30, 26 December 2022 (UTC)

2714: Cold Complaints

2022-12-22T05:26:09Z

172.71.154.38: Undo revision 302300 by CobsonTheGemson (talk)

{{comic
| number = 2714
| date = December 21, 2022
| title = Cold Complaints
| image = cold_complaints_2x.png
| imagesize = 740x254px
| noexpand = true
| titletext = Our investigation into whining-based remedies became the first study to be halted by the IRB on the grounds that the treatment group was 'too annoying.'
}}

==Explanation==
{{incomplete|Created by a GIGANTIC WHINING BABY - Do NOT delete this tag too soon.}}

When people are ill, they will often complain about the symptoms that they're suffering from. A common sterotype is that men will revert to infantile behavior when miserably sick. This can be annoying to the people around them, but they typically tolerate such behavior out of compassion. The joke in this comic is that [[Hairy]] spoke via a {{w|telemedicine}} appointment to [[Ponytail]], a medical professional who explicitly advised him to act out, since his condition has no effective medical treatment. He takes her advice to, "act like you're the first person ever to have a cold," literally, stating it specifically when his companion asks about it.

This comic was published during a "tripledemic" in the U.S., involving {{w|COVID-19}}, {{w|influenza}}, and {{w|respiratory syncytial virus}} (RSV, a frequent cause of common colds) infections, the latter of which have no cure other than to wait them out with plenty of rest and fluids. It expounds on the finding that, "talking about troublesome events, including events with which one is dissatisfied, may ... result in improved physiological health." (Kowalski, R.M. (2002) [http://people.uncw.edu/hakanr/documents/whining.pdf "Whining, griping, and complaining: positivity in the negativity"] ''Journal of Clinical Psychology'' '''58'''(9):1023-35.)

The title text describes a similar study, but where the {{w|institutional review board}} (IRB) halted the study because the participants were too annoying. This is ironic since they would be expected to whine annoyingly. IRBs are expected to review the ethics of a research project. Whining is not usually considered dangerous,{{citation needed}} but in this case it was presumably so intolerable that they had to put a stop to it.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Hairy sitting on a chair in front of a computer screen. There is an image of Ponytail on the screen speaking.]
:Ponytail: Well, it's not COVID or flu. Probably one of the other viruses.
:Hairy: Ughh

:[A zoomed out version of the image, Ponytail cannot be seen]
:Ponytail: There's not much you can do to speed up recovery other than rest, hydrate, and whine and complain and be a gigantic baby about it.

:[Same as previous panel]
:Hairy: Whine and complain?
:Ponytail: Yeah. You need to act like you're the first person ever to have a cold.

:[Hairy lying on a couch wrapped in a blanket, with a lot of paper tissues around]
:Off-screen voice: Are you '''''sure''''' that's what she said?
:Hairy: Unbelievable. Here I am, the only person ever to feel bad, and you're '''''doubting''''' me?

{{comic discussion}}
[[Category:Comics featuring Hairy]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]
[[Category:COVID-19]]

2714: Cold Complaints

2022-12-22T04:05:44Z

172.71.154.38: Rvv

{{comic
| number = 2714
| date = December 21, 2022
| title = Cold Complaints
| image = cold_complaints_2x.png
| imagesize = 740x254px
| noexpand = true
| titletext = Our investigation into whining-based remedies became the first study to be halted by the IRB on the grounds that the treatment group was 'too annoying.'
}}

==Explanation==
{{incomplete|Created by a GIGANTIC WHINING BABY - Do NOT delete this tag too soon.}}

When people are ill, they will often complain about the symptoms that they're suffering from. A common sterotype is that men will revert to infantile behavior when miserably sick. This can be annoying to the people around them, but they typically tolerate such behavior out of compassion. The joke in this comic is that [[Hairy]] spoke via a {{w|telemedicine}} appointment to [[Ponytail]], a medical professional who explicitly advised him to act out, since his condition has no effective medical treatment. He takes her advice to, "act like you're the first person ever to have a cold," literally, stating it specifically when his companion asks about it.

This comic was published during a "tripledemic" in the U.S., involving {{w|COVID-19}}, {{w|influenza}}, and {{w|respiratory syncytial virus}} (RSV, a frequent cause of common colds) infections, the latter of which have no cure other than to wait them out with plenty of rest and fluids. It expounds on the finding that, "talking about troublesome events, including events with which one is dissatisfied, may ... result in improved physiological health." (Kowalski, R.M. (2002) [http://people.uncw.edu/hakanr/documents/whining.pdf "Whining, griping, and complaining: positivity in the negativity."] ''Journal of clinical psychology,'' '''58'''(9):1023-35.)

The title text describes a similar study, but where the {{w|institutional review board}} (IRB) halted the study because the participants were too annoying. This is ironic since they would be expected to whine annoyingly. IRBs are expected to review the ethics of a research project. Whining is not usually considered dangerous,{{citation needed}} but in this case it was presumably so intolerable that they had to put a stop to it.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Hairy sitting on a chair in front of a computer screen. There is an image of Ponytail on the screen speaking.]
:Ponytail: Well, it's not COVID or flu. Probably one of the other viruses.
:Hairy: Ughh

:[A zoomed out version of the image, Ponytail cannot be seen]
:Ponytail: There's not much you can do to speed up recovery other than rest, hydrate, and whine and complain and be a gigantic baby about it.

:[Same as previous panel]
:Hairy: Whine and complain?
:Ponytail: Yeah. You need to act like you're the first person ever to have a cold.

:[Hairy lying on a couch wrapped in a blanket, with a lot of paper tissues around]
:Off-screen voice: Are you '''''sure''''' that's what she said?
:Hairy: Unbelievable. Here I am, the only person ever to feel bad, and you're '''''doubting''''' me?

{{comic discussion}}
[[Category:Comics featuring Hairy]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]
[[Category:COVID-19]]

Talk:2714: Cold Complaints

2022-12-22T03:20:56Z

172.71.154.38: /* Slot Gacor */ rv spam

That study sounds like something that would win an Ig Nobel Prize. But the 2002 prize in medicine went to "Scrotal Asymmetry in Man and in Ancient Sculpture". [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 20:37, 21 December 2022 (UTC)

Also common cold cannot really be cured, just wait and see. http://www.picturequotes.com/proper-treatment-will-cure-a-cold-in-seven-days-but-left-to-itself-a-cold-will-hang-on-for-a-week-quote-272191 [[User:Vdm|Vdm]] ([[User talk:Vdm|talk]]) 20:49, 21 December 2022 (UTC)

Are we sure that's the actual explanation? I thought the panels we see of the telemedicine are fibs to explain why Harry is acting this way. As in, he's pretending a medical professional told him to act like this. [[Special:Contributions/172.69.68.13|172.69.68.13]] 21:59, 21 December 2022 (UTC)

Can the citation be moved to a ref tag instead of just Being There? on a related note, why is the 58 bolded? [[Special:Contributions/172.71.166.76|172.71.166.76]] 22:32, 21 December 2022 (UTC) [[NonUser:Bumpf|Bumpf]] ([[NonUser talk:Bumpf|shh]])
:We usually don't bother with the cite and just use numbered links, especially in cases like this where the full cite is on the first page of the link. I'll change it. Journal volume numbers are written in bold in APA style. [[Special:Contributions/172.69.22.79|172.69.22.79]] 00:23, 22 December 2022 (UTC)

I know far too many people who already follow this course of treatment. And not just for viruses, either. [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 23:59, 21 December 2022 (UTC)

Is the accepted explanation for this comic that it is... mocking people who ask for sympathy or help when unwell for being "big babies"? That seems uncomfortably close to, say, making fun of people who seek treatment for mental illness... I understand that there is a disproportionate level of complaint relative to minor discomfort that is ridiculous and maybe even funny, but that doesn't seem to have been established here. I think we should emphasize that, "Hey, it's perfectly fine and even healthy to talk about the disappointment of feeling shitty, but don't take it to this extreme" - even if the original comic arguably doesn't do so. [[User:Notanotherusername|Notanotherusername]] ([[User talk:Notanotherusername|talk]]) 03:01, 22 December 2022 (UTC)

2714: Cold Complaints

2022-12-21T22:11:47Z

172.71.154.38: /* Explanation */ plurality agreement

{{comic
| number = 2714
| date = December 21, 2022
| title = Cold Complaints
| image = cold_complaints_2x.png
| imagesize = 740x254px
| noexpand = true
| titletext = Our investigation into whining-based remedies became the first study to be halted by the IRB on the grounds that the treatment group was 'too annoying.'
}}

==Explanation==
{{incomplete|Created by a GIGANTIC WHINING BABY - Do NOT delete this tag too soon.}}

When people are ill, they will often complain about the symptoms that they're suffering from. A common sterotype is that men will revert to infantile behavior when miserably sick. This can be annoying to the people around them, but they typically tolerate such behavior out of compassion. The joke in this comic is that [[Hairy]] spoke to a medical professional via {{w|telemedicine}}, when he was explicitly advised to act like this, since his condition has no effective medical treatment. He takes the advice to, "act like you're the first person ever to have a cold," literally, stating it specifically when his companion asks about it.

This comic was made in the rise of a "tripledemic" involving {{w|COVID-19}}, {{w|influenza}}, and {{w|respiratory syncitial virus}} (RSV) infections, none of which have any cure other than to just wait them out. It expounds on the finding that, "talking about troublesome events, including events with which one is dissatisfied, may ... result in improved physiological health." (Kowalski, R.M. (2002) [http://people.uncw.edu/hakanr/documents/whining.pdf "Whining, griping, and complaining: positivity in the negativity."] ''Journal of clinical psychology,'' '''58'''(9):1023-35.)

The title text mentions a study like that, but in this case the {{w|institutional review board}} (IRB) halted the study because the participants were too annoying. This is ironic since they'd be expected to whine annoyingly. IRBs are expected to review the ethics of a research project. Whining is not usually considered dangerous,{{citation needed}} but in this case it was presumably so intolerable that they had to put a stop to it.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Hairy sitting on a chair in front of a computer screen. There is an image of Ponytail on the screen speaking.]
:Ponytail: Well, it's not COVID or flu. Probably one of the other viruses.
:Hairy: Ughh

:[A zoomed out version of the image, ponytail cannot be seen]
:Ponytail: There's not much you can do to speed up recovery other than rest, hydrate, and whine and complain and be a gigantic baby about it.
:Hairy: Whine and complain?
:Ponytail: Yes. You have to behave like you're the first person ever to have a cold.

:[Hairy lying on a couch wrapped in a blanket, with a lot of paper tissues around]
:Off-screen voice: Are you '''''sure''''' that's what she said?
:Hairy: Unbelievable. Here I am, the first person to ever feel bad, and you're '''''doubting''''' me?

{{comic discussion}}

2714: Cold Complaints

2022-12-21T22:09:26Z

172.71.154.38: /* Explanation */ usage

{{comic
| number = 2714
| date = December 21, 2022
| title = Cold Complaints
| image = cold_complaints_2x.png
| imagesize = 740x254px
| noexpand = true
| titletext = Our investigation into whining-based remedies became the first study to be halted by the IRB on the grounds that the treatment group was 'too annoying.'
}}

==Explanation==
{{incomplete|Created by a GIGANTIC WHINING BABY - Do NOT delete this tag too soon.}}

When people are ill, they will often complain about the symptoms that they're suffering from. A common sterotype is that men will revert to infantile behavior when miserably sick. This can be annoying to the people around them, but they typically tolerate such behavior out of compassion. The joke in this comic is that [[Hairy]] spoke to a medical professional via {{w|telemedicine}}, when he was explicitly advised to act like this, since his condition has no effective medical treatment. He takes the advice to, "act like you're the first person ever to have a cold," literally, stating it specifically when his companion asks about it.

This comic was made in the rise of a "tripledemic" involving {{w|COVID-19}}, {{w|influenza}}, and {{w|respiratory syncitial virus}} (RSV) infections, none of which have any cure other than to just wait it out. It expounds on the finding that, "talking about troublesome events, including events with which one is dissatisfied, may ... result in improved physiological health." (Kowalski, R.M. (2002) [http://people.uncw.edu/hakanr/documents/whining.pdf "Whining, griping, and complaining: positivity in the negativity."] ''Journal of clinical psychology,'' '''58'''(9):1023-35.)

The title text mentions a study like that, but in this case the {{w|institutional review board}} (IRB) halted the study because the participants were too annoying. This is ironic since they'd be expected to whine annoyingly. IRBs are expected to review the ethics of a research project. Whining is not usually considered dangerous,{{citation needed}} but in this case it was presumably so intolerable that they had to put a stop to it.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Hairy sitting on a chair in front of a computer screen. There is an image of Ponytail on the screen speaking.]
:Ponytail: Well, it's not COVID or flu. Probably one of the other viruses.
:Hairy: Ughh

:[A zoomed out version of the image, ponytail cannot be seen]
:Ponytail: There's not much you can do to speed up recovery other than rest, hydrate, and whine and complain and be a gigantic baby about it.
:Hairy: Whine and complain?
:Ponytail: Yes. You have to behave like you're the first person ever to have a cold.

:[Hairy lying on a couch wrapped in a blanket, with a lot of paper tissues around]
:Off-screen voice: Are you '''''sure''''' that's what she said?
:Hairy: Unbelievable. Here I am, the first person to ever feel bad, and you're '''''doubting''''' me?

{{comic discussion}}

2713: Data Point

2022-12-20T09:41:11Z

172.71.154.38: /* Explanation */ copyedit

{{comic
| number = 2713
| date = December 19, 2022
| title = Data Point
| image = data_point_2x.png
| imagesize = 315x409px
| noexpand = true
| titletext = In general you should only include your single best data point in the paper. The rest of the data can go in the supplementary materials.
}}

==Explanation==
{{incomplete|Created by a REALLY COOL DATA POINT. Do NOT delete this tag too soon.}}

When scientific measurements are made, the conclusions are almost always based on many data points observed in relation to each other. The comic jokes that a single data point can somehow be of sufficient interest in isolation that the other data may be disregarded. In reality, a single datum can almost never represent what the information in all the data taken together indicate.

In this case the data point looks like a {{w|TIE fighter}} flying at you from the direction of the Sun. This is so cool that the entire focus of the scientific paper should be on this figure alone, as stated in the caption. [[Randall]] suggests this is a "science power move."

This is probably a joke about papers which only highlight particularly interesting or significant data without including the background measurements or similar mundane information necessary to fully understand or reproduce the findings. While there are [https://www.aje.com/en/arc/data-not-shown-4-reasons-omit-figure-or-table/ accepted reasons for this practice,] it can be particularly annoying when trying to follow an otherwise useful procedure or comparing aspects of the results the authors did not anticipate.

The title text suggests relegating all the other data to supplementary materials, presumably to avoid detracting from the single "cool" datum.

==Transcript==
:[A graph is shown. There are two axis with bullets up along the Y-axis and unreadable labels along the X-axis. There are no ticks on the axis. The graph itself is black with a round white center from where white lines "radiate" out in all directions, like a star or sun. In the center there is a single data point with symmetrical vertical error bars. Beneath the graph there are two lines of unreadable text to the left. To the right there is a rectangular box with a dot, representing the data point, and then an unreadable label. Above the graph there is a label:]
:Figure 2.

:[Caption beneath the panel:]
:Science power move: When one of your data points is really cool, devote a whole figure to it.

{{comic discussion}}

[[Category:Science]]
[[Category:Scientific research]]

2711: Optimal Bowling

2022-12-17T07:21:21Z

172.71.154.38: /* Explanation */ reword

{{comic
| number = 2711
| date = December 14, 2022
| title = Optimal Bowling
| image = optimal_bowling_2x.png
| imagesize = 306x670px
| noexpand = true
| titletext = If you want to bowl a strike, the optimal place is almost certainly inside a bowling alley, although with a little luck any establishment uphill from one could also work.
}}

==Explanation==
{{incomplete|Created by a SUPERMASSIVE BOWLING BALL - Need a full analysis of each graph (preferably with input from someone who understands bowling). Do NOT delete this tag too soon.}}

This series of line graphs purports to advise players on how to improve their odds of achieving a strike in the sport of {{w|bowling}} – presumably {{w|ten-pin bowling}}, the most popular version of the sport in the United States. Among the parameters being measured — those being angle of throw, throwing speed, spinning speed, and weight of the ball — all four graphs encompass a range far larger than would be useful for reference by a bowler. The latter three in particular are on {{w|logarithmic scale}}s, leading up to values that are impossible for a human to achieve.{{Citation needed}}

The first line graph indicates that a bowler has the greatest chance of achieving a strike by aiming the ball directly at the pins, with the chance of a strike decreasing rapidly as the ball is aimed to the left or the right. The closer you aim to the pins, the more likely it is you hit them.{{Citation needed}} While a novice bowler may have difficulty achieving a 0° angle roll, their roll would still not come close to a -90° or 90° angle (due left or due right), much less a -180° or 180° angle (which, in either case, would be the opposite direction from the pins). Unlike with the other graphs, it is physically possible for a bowler to aim the ball at any angle, albeit not permissible under bowling rules; aiming the ball at an angle which deviates significantly from 0° would most likely cause the ball to end up in the gutter, while more violent or wildly aimed actions could create a risk of the ball going into one of the other lanes or missing the lanes entirely, which could annoy, anger, or even endanger other bowlers and employees of the bowling alley.

The second graph indicates that a bowler has the greatest chance of achieving a strike by throwing the ball about 5-20 m/s (11-45 mph, 18-72 kph), with the chance of a strike decreasing as the speed is increased or decreased. Most bowlers cannot throw more than 45 m/s (100 mph or 160 kph).{{Citation needed}} According to the graph, any throw faster than 100 m/s would cause equipment damage, and then widespread destruction several orders of magnitude later. (Possibly a reference to {{what if|1|Relativistic Baseball}}.) The graph ends at the {{w|speed of light}}, as it is physically impossible to throw anything faster.

The third graph concerns the rotational speed of the ball. The "ball explodes" section is a reference to one of Randall's favorite equations, which is that an object cannot spin faster than the square root of its specific tensile strength. Spinning the ball any faster than this limit would cause the bowling ball to lose its structural integrity and explosively disintegrate. At particularly high speeds, the material of the ball would be flung outwards at a significant fraction of the speed of light, causing, as in graph #2, widespread destruction (possibly a reference to {{what if|92|One-Second Day}}.)

The fourth graph in this comic illustrates a bowler's probability of a strike with a ball whose mass ranges from 100 kg (2.2 pounds) to close to 1010 kg (over 22 billion pounds), and continues by indicating that balls even larger than that would cause "equipment damage" (up to 1020 kg) or the creation of a black hole (starting from around 1025 kg and up). The last entry on the x-axis of this graph is 1040 kg, which is about 5 billion times the mass of the {{w|Sun}}.

By contrast, the {{w|United States Bowling Congress}} requires all bowling balls to weigh no more than 16 pounds (that is, a mass of no more than 7.257 kg), with no minimum weight. Hence, if the x-axis of the graph ran from, say, 0 to 8 kg, the graph might actually impart some useful information.

The title text continues the trend of providing unhelpful information by stating that the optimal place to stand when trying to bowl a strike is inside the bowling alley. It is quite obvious that if one is to attempt to bowl a strike, they should stand near the pins, hence inside a bowling alley. The title text also mentions the possibility of "any establishment uphill from one" working, with a little luck. This suggests the possibility of rolling the bowling ball downhill, into the bowling alley (possibly ''through'' it) and into the pins. If the ball were to be launched at very high speed, its destructive power would allow it to get a strike from any site with a bowling alley along the ball's path. If launched at sufficiently high rotational speed, it could achieve one or more strikes, even from the outside, in any bowling alley that doesn't have enough solid shielding between the pins and the fragments of the exploding ball. These last two cases are technically covered in the "widespread destruction" parts of the graphs, and it isn't clear if they count as "strikes". Since they allow the possibility of more than one simultaneous strike (albeit not necessarily in one's own lane), they might be considered to have higher probabilities of strikes than the conventional method of play does. These require a somewhat broadened definition of "strike" which doesn't assume the structural integrity of the pins after they're hit.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[The header is surrounded on either side by small drawings of two bowling pins and a bowling ball.]
:Data for Optimal Bowling

:[Four line graphs are depicted. Each has a numbered one-word general description in a box at the top, an unlabeled y-axis, and a labeled x-axis. The relevant curve and other comments on each graph are in red.]

:1. Aim
:[The graph's x-axis is labeled from -180° to 180°.]
:Release Direction
:[The red curve on the graph is just above the x-axis at all points except for a steep peak around 0°. The red curve is labeled:]
:Relative Probability of Strike

:2. Speed
:[The graph's x-axis is labeled from 10-1 to 108, with the last point on the x-axis labeled "Speed of Light".]
:Ball Speed (m/s)
:[The red curve on the graph starts at the x-axis for 10-1, reaches its peak around 10, then declines and becomes a dashed line ending around three-quarters of the peak around 102. The remainder of the curve is replaced by two labels:]
:Equipment Damage
:Widespread Destruction

:3. Spin
:[The graph's x-axis is labeled from 0 to 1012.]
:Spin (RPMs)
:[The red curve on the graph starts about halfway from its peak for 0, reaches its peak somewhere between 0 and 1,000, then declines and becomes a dashed line around 1,000, soon after which the remainder of the curve is replaced by two labels:]
:Ball Explodes
:Widespread Destruction

:4. Weight
:[The graph's x-axis is labeled from 100 to 1040.]
:Ball Mass (kg)
:[The red curve on the graph starts just above the x-axis for 100, rises steeply and drops steeply ending just above the x-axis, then becoming a dashed line, all before reaching 1010. The remainder of the curve is replaced by two labels:]
:Equipment Damage
:Black Hole Created

{{comic discussion}}

[[Category:Line graphs]]
[[Category:Comics with color]]
[[Category:Sport]]

Talk:2711: Optimal Bowling

2022-12-15T10:50:29Z

172.71.154.38:

Who cares about rules? I mean, I'm pretty sure your score won't count according to rules if you bowl from establishment uphill from bowling alley. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 05:36, 15 December 2022 (UTC)

If the ball has a diameter of 8.5 inches (multiplied by 2.54 and Pi makes about 67.8cm circumference) the rpm is also limited by the speed of light of the surface (reached at about 6.4x10^9rpm).

Please elaborate on how widespread the aforementioned destruction would be. [[Special:Contributions/172.71.154.38|172.71.154.38]] 10:50, 15 December 2022 (UTC)

2710: Hydropower Breakthrough

2022-12-15T05:36:48Z

172.71.154.38: /* Explanation */ might as well link

2710: Hydropower Breakthrough

2022-12-14T00:31:21Z

172.71.154.38: /* Explanation */

{{comic
| number = 2710
| date = December 12, 2022
| title = Hydropower Breakthrough
| image = hydropower_breakthrough_2x.png
| imagesize = 261x303px
| noexpand = true
| titletext = A hydroelectric dam is also known as a heavy water reactor.
}}

==Explanation==
{{incomplete|Created by a PRACTICAL WATER REACTOR - Needs another citation for the announcement since the one that was present required a subscription to a paper! Do NOT delete this tag until the year 2039, or until fusion reactors have succeeded.}}
The comic parodies fusion reactors, a form of electrical generator that takes in deuterium and tritium and outputs helium and massive amounts of power. However, maintaining a fusion reaction is notoriously difficult, and for the longest time fusion reactors required external power to keep running, substantially more than they give back. In the past years, constant developments in fusion reactors have slowly increased the energy output of fusion to more than the input. It is possible this is meant to directly parody the Department of Energy's anticipated announcement of Q>1 fusion. The announcement is scheduled for the day after this comics release, and [https://www.washingtonpost.com/business/2022/12/11/fusion-nuclear-energy-breakthrough/ the date of this announcement was announced the day this comic went up.]

A {{w|hydroelectric dam}} is a power facility that generates electricity from water flowing in a river passing through a water turbine and generator. In the comic, [[Beret Guy]], unscientific as always, presents a hydroelectric dam. However, instead of generating energy, it generates a flow of water. This is similar to the way that a fusion reactor takes energy (and hydrogen isotopes) as an input and energy (and helium isotopes) as outputs. While one member of the audience shouts "Hooray!", another member of audience, who is presumably familiar with regular physics, says "Wait.", presumably because they realize that, instead of the normal approach, Beret Guy has been pursuing the essentially useless goal of producing more water (or possibly because they're confused that, on the face of it, it appears to be violating {{w|conservation of mass}}, which would usually require that a dam should produce the same amount of water as that fed into it - that said, for a regular dam in a natural valley like the one shown in this comic, it is entirely normal for the dam to "produce" more water than input in the sense that in addition to water from upstream rivers, the dam will also output any "unofficial" inflow from direct rainfall above and from uncharted sources of groundwater below).

If you only regard a limited time interval, a dam releasing temporally more water than is fed into it, can occur naturally, especially seasonally (stored water is released during a dry period) or accidentally (a dam break). The title "breakthrough" could be interpreted that way, making Beret Guy's announcement the opposite of a joyous occasion.

It is possible-- likely, even, considering Beret Guy's quasi-supernatural nature and regular violations of physical law-- that his dam ''is'' violating conservation of mass and creating water through magical means. It is also possible that the dam contains direct energy-mass conversion technology, and is converting input energy into mass. In this case, the dam would be quite useless as a power plant, and would in-fact consume more energy than many entire countries. If the dam is not magical, it is possible that the dam is powered by {{w|zero point energy}}, something that Beret Guy has shown competence in handling (see [[1486: Vacuum]]).

The symbol Q is normally used to refer to {{w|fusion energy gain factor}}, the ratio of power generated by a fusion reactor to the energy used to maintain it. An energy source isn't useful if it takes more power to run it than it produces, so Q > 1 means the reactor is producing net energy. Q also can represent the volumetric flow rate of water through a hydroelectric dam, and in this case, a Q > 1 would have no great significance. Beret Guy has somehow mixed the two up, making the rate of flow as the output of the reaction and increasing it.

The title text further confuses the issue as it introduces nuclear ''fission'' and equates the hydroelectric dam with a heavy water reactor, which is a special type of nuclear fission reactor that uses deuterium (heavy water) as a moderator to absorb neutrons. This is also a pun because one could simplistically say that a hydroelectric dam runs on the weight of water (potential energy stored in the water: U = mgh), or that it is a water reactor (producing electricity) that is heavy (bulky). While a hydroelectric power plant is not actually a reactor, it would have to be using a reaction (such as 2H2 + O2 -> 2H2O) to create water to satisfy Beret Guy's statement that more water is produced than fed into the dam, while simultaneously satisfying the law of conservation of mass. Alongside that, the title text is possibly making a pun on water and fusion reactors. Heavy water is the primary source of deuterium, a specific isotope of hydrogen required for the most energy-efficient fusion reactions needed today. On the other hand, water is the liquid that passes through dams, and is rarely used for fusion reactions today — although [https://what-if.xkcd.com/14/ it could be used as fusion fuel because it is made of hydrogen and oxygen.]

The title is probably also part of the joke in that hydro could be referring to water or HYDROgen [sic]. The hydrogen is presumably the fuel for fission. The name "hydrogen" itself means "water maker" from the roots "hydro-" and "-gen".

On 29 November 2022 Adam Selipsky CEO of Amazon Web Services (AWS) (A large Cloud provider and IT department of the Amazon webshop) announced in his Re:Invent (an annual congress for AWS customers where AWS announced new services and roadmaps) keynote that AWS will become water positive by 2030, he explained that AWS by then will produce more water than it consumes.
https://www.mobileworldlive.com/featured-content/top-three/aws-ceo-makes-water-sustainability-pledge/amp/
(video recording is available of it as well on a different website)

This might have inspired the cartoonist make a water positive dam.

A way to create more water than one consumes can be by using hydrogen and take out part of the energy via a reaction with Oxygen in the air, like Hydrogen cars do. As AWS wants to be energy carbon neutral by 2025 and uses wind and solar power, a way to have energy available during times when there is not enough solar and wind is to store energy in hydrogen during times when there is too much, then 'burning' that hydrogen at scarce moments.

The output can then be distilled water. So it's important that the additional water that is created will not just be 'dumped' into the environment, since that can dehydrate the existing ecosystem.

This cartoon takes that as a first warning already by showing a dam containing the water in a natural environment.

AWS is an IT provider with hundreds of data centra, with many millions of computers. These typically use water to cool the computers. This cooling water heats up, energy can be extracted via a heat pump and be re-used. Sometimes (this doesn't have to be the case for AWS) this water is actually dumped when the water is not hot enough for the heat pump, and not cool enough to cool the machines.
Sometimes the heat is used to heat houses or greenhouses.

==Transcript==
:[Beret Guy is standing on a podium behind a lectern. He is gesturing with his hand, palm up, towards a poster hanging behind him. On it is a picture of a tall dam, with a lake behind, and water coming out at the foot of the dam in the valley on the other side. Two voices reacts to Beret Guy's statement from off-panel.]
:Beret Guy: We are pleased to announce that our hydroelectric dam has achieved Q>1, producing more water than we fed into it!
:Off-panel voice 1: Hooray!
:Off-panel voice 2: Wait.

{{comic discussion}}

[[Category:Comics featuring Beret Guy]]
[[Category:Strange powers of Beret Guy]]
[[Category:Public speaking]]
[[Category:Physics]]

2708: Mystery Asterisk Destination

2022-12-09T04:09:05Z

172.71.154.38: /* Explanation */ obviously not serious

{{comic
| number = 2708
| date = December 7, 2022
| title = Mystery Asterisk Destination
| image = mystery_asterisk_destination_2x.png
| imagesize = 288x248px
| noexpand = true
| titletext = If you ever see the † dagger symbol with no unmatched footnote, it means the writer is saying the phrase while threatening you with a dagger.
}}

==Explanation==
{{incomplete|Created by a BOT.* Do NOT delete this tag too soon.†}}

This comic pertains to the use of asterisks and other symbols for footnotes or endnotes. It jokes that when an asterisk appears after a word without a corresponding footnote, it refers to this comic. This may provide closure for some readers, similarly in spirit to [[391: Anti-Mindvirus]], and opposite to the unmatched parenthesis of [[859: (]].

An unpaired asterisk or dagger often does not refer to a footnote, and thus does not constitute a mystery. Examples include programming languages and mathematical expressions using asterisks such as for the multiplication operator, or dates of birth and death which are sometimes indicated with an asterisk or dagger respectively.

The title text jokes that unmatched instances of † (a dagger; a symbol for a secondary footnote) are threats being made by the author to the reader with a physical dagger. As of this writing, it states "If you ever see the † dagger symbol with no '''''un'''''matched footnote...", forming a double negative. This is likely a typo intended as "...no matching footnote."

==Transcript==
:[A blank panel with text at the bottom.]
:'''*'''Whenever you see a mystery asterisk that doesn't have a matching footnote, it points here.

{{comic discussion}}

2703: Paper Title

2022-11-26T03:28:16Z

172.71.154.38: /* Explanation */ unsure

{{comic
| number = 2703
| date = November 25, 2022
| title = Paper Title
| image = paper_title_2x.png
| imagesize = 557x261px
| noexpand = true
| titletext = CONFLICT OF INTEREST STATEMENT: The authors hope these results are correct because we all want to be cool people who are good at science.
}}

==Explanation==
{{incomplete|Created by a MICROBE TRYING TO LURE YOU WITH CLICKBAIT. Do NOT delete this tag too soon.}}

Many if not most scientific research papers present a {{w|hypothesis}} and the result of testing the hypothesis. Scientific papers should also have titles which describe the content of the papers. See [[2456: Types of Scientific Paper]].

[[Cueball]] is writing a research paper with a {{w|clickbait}}, {{w|puffery}}, and insufficiently descriptive title, "Check out this cool microbe we found." His colleague [[Megan]] asks him whether science is supposed to be about formulating a hypothesis and testing it. Cueball agrees, changing the title to, "Is our lab really good at finding cool microbes? Some preliminary data." However, that is still an overly promotional and insufficiently descriptive clickbait title, purporting to be a study of the authors' own competence, which would be highly unusual because of the lack of objectivity due to the authors being the subject of investigation. [[:Category:Clickbait|Clickbait]] is a recurring theme on xkcd, recently considered within science publications in [[2001: Clickbait-Corrected p-Value]].

{{w|Empirical research|''Empirical investigations''}} and ''{{w|analysis}} papers'' almost always state and test a hypothesis, but there are many kinds of scientific papers which likely will not, including ''{{w|literature review}}s,'' which qualitatively summarize the results of other papers; ''{{w|meta-analysis|meta-analyses}},'' which quantitatively summarize the results and quality of other work; ''observational reports'' (or ''{{w|case study|case studies}}'' — not to be confused with {{w|observational study|observational studies}}, a kind of empirical analysis), which present data and a chronicle of its collection often without analysis, testing, or interpretation; ''{{w|Conference proceeding|conference papers}},'' which present preliminary work without peer review; ''definition papers,'' which attempt to formalize terms used in divergent ways in prior work; ''{{w|Dialectic#Hegelian dialectic|syntheses}},'' which present alternative views combining multiple and often conflicting concepts; ''{{w|Comparison|comparative studies}},'' which compare and contrast a class of concepts; ''{{w|Interpretive discussion|interpretive}} papers,'' showing a different perspective on previous work; ''{{w|technical report}}s,'' which may present information on a specific procedural topic or progress and results, if any, in a field; ''opinion'' and ''editorial essays,'' which are intended to argue a point of view persuasively; ''book reviews,'' which summarize monographs or biographies; and ''grant proposals,'' which make the case for funding a project. Mathematical or logic research papers which don't involve empirical observations or uncertainty would be considered technical reports in other fields. Engineering work can be reported as an empirical investigation or a technical report. Research articles which do present and test a hypothesis are usually written in [https://www.hamilton.edu/academics/centers/writing/writing-resources/how-to-write-an-apa-research-paper American Psychological Association (APA) style].

Cueball seems to want to author an observational report, but Megan would prefer an empirical investigation or analysis, perhaps because they may be more likely to be accepted by peer reviewed journals, and as such are more prestigious than mere conference papers, "letters," or "communications" as observational reports are often published. However, research articles describing the discovery of new {{w|microbe}}s in prestigious peer-reviewed journals are often published as observational reports,[https://www.microbiologyresearch.org/content/journal/ijsem/10.1099/ijsem.0.004029][http://calamar.univ-ag.fr/mangroveSAE/articles/2022/Volland%20et%20al%202022.pdf][https://link.springer.com/article/10.1007/s10482-021-01656-x] so Megan's concerns may be unfounded; even if so, the editors of any reputable journal would almost certainly require a far more descriptive and less overtly promotional title from Cueball. The question remains whether an intial submission with a catchy clickbait title might get more prompt attention from editors and reviewers.

In the title text, the {{w|conflict of interest}} statement says that the authors hope their results are correct because, "we all want to be cool people who are good at science." A scientific publication's potential conflict of interest usually refers to the authors' financial, familial, or other external interests in the research outcomes. The disclosure statement does not describe a conflict between the authors' {{w|extrinsic motivation}}s and factors influencing the accuracy and neutrality of their work; in fact it claims the opposite, an alignment between their {{w|intrinsic motivation}}s and the goal of producing high quality work, which should go without saying.

==Transcript==
:[Megan is standing behind and looking over the shoulder of Cueball who is sitting in his office chair at his desk typing on the keyboard. A line from the keyboard goes up to two boxes above them. A smaller one at the top, half the length and a third the height of the larger box below. There are text in both boxes. The bottom box is not filled out with text. At the end of the text in the bottom box the line indicating where the courser are can be seen, as in this is what Megan can see on the screen:]
:Paper title
:''Check out this cool microbe we found''|

:[Pan to only showing Megan who has taken a hand up to her chin. Cueball replies from off-panel.]
:Megan: Isn’t science supposed to be about formulating a hypothesis and then testing it?
:Cueball - off panel: Oh. Yeah, I guess.

:[Same setting as in the first panel, but now the bottom box is filled out with text, but still with the courser shown at the end:]
:Paper title
:''Is our lab really good at finding cool microbes? Some preliminary data''|

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Scientific research]]
[[Category:Science]]
[[Category:Clickbait]]

2701: Change in Slope

2022-11-23T01:27:49Z

172.71.154.38: /* Explanation */ Randall's suggested method

{{comic
| number = 2701
| date = November 21, 2022
| title = Change in Slope
| image = change_in_slope_2x.png
| imagesize = 656x371px
| noexpand = true
| titletext = Squinting at a graph is fine for getting a rough idea of the answer, but if you want to pretend to know it exactly, you need statistics.
}}

==Explanation==
{{incomplete|Created by a SIDEWAYS STATISTIC. Do NOT delete this tag too soon.}}

The comic is a tip for detecting changes in slopes over a {{w|scatter plot}} of data. This is a common requirement in exploratory statistics for comparing trends in a series — finding the cutoff where the slope changes may reveal valuable information about the data.

The comic compares two methods. Firstly, a novice method — by 'doing a bunch of statistics'- i.e, applying various statistical tools to analyze the data and figure out the quantitative change in slope. This results in two equations for the trendlines above and below a given value, a box plot, a histogram, and a line chart. It is unknown exactly what methods the novice used to figure out the change in slope in the data. Possibilities include calculating the [https://stackoverflow.com/a/45063636 derivatives] (which probably won't work well on noisy data such as shown), or [https://stackoverflow.com/a/71744293 gradients], or using a [https://stackoverflow.com/a/47522444 Savitzky-Golay filter or piecewise linear smoothing spline fits]. [[Randall]]'s light gray figures seem to be suggesting [https://colab.research.google.com/drive/1Ru90DAxHO9zzXrx-_4P28UJ_8MaHT0RL this method.]

The other is the so-called 'expert' method, which involves [https://cdn.discordapp.com/attachments/525939879805190154/1044395695525875712/xkcd_sideways.png tilting the page the graph is printed on to view changes in slope] better. For small changes in an underlying trend, similar to that apparently shown in the comic, direct visual inspection cannot always identify or even reveal the effect. The comic shows, however, that by taking the page and rotating it in just the right way, the foreshortened perspective can make certain details much more apparent, allowing the 'expert' to see at a glance that there is a change in the slope. Ironically, tilting the comic to make the original roughly resemble the perspective of the 'tilted' version graph shown in the comic shows that the right-hand panel is slightly exaggerated for visual effect. The use of {{w|Perspective (graphical)|perspective}} to make information pop into the audience's view has been used by artists for {{w|The_Ambassadors_(Holbein)|centuries}}.

However, applying such an approach to data plots can run into errors — the primary one being parallax error from the oblique viewing angle causing the observer to not necessarily identify or clearly find the point at which the slope changes. It also does not reveal any data about the quantitative value of the change in slope, merely proving the existence of one. Furthermore, noisy data might show an apparent slope change that is not representative of an actual change in the underlying data, so even more advanced [https://www.danielsoper.com/statcalc/calculator.aspx?id=103 statistics testing the hypothesis of whether an apparent slope change is real] may likely be a good idea.

The title text then goes on to say that, while such a trick is useful to identify that there is some change in slope, in order to ''pretend'' to know it exactly one must revert to statistics (the "novice method") to obtain some form of information, defeating some of the premise of the comic. This at least produces a semblance of statistical rigor although, once an answer appears obvious, data could be interpreted to reach an answer that you are now expecting rather than revealing something of more statistically useful significance.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:How to detect a change in the slope of your data

:[First column, on the left]
:Novice method:
:[A graph, with dots forming a rough line, math formulas, and sub graphs]
:Do a bunch of statistics

:[Second column, on the right]
:Expert method:
:[Perspective view of the previous graph, with the legend "Hey look, it bends here" and an arrow pointing to the graph]
:Tip the graph sideways

{{comic discussion}}

[[Category:Charts]]
[[Category:Scatter plots]]
[[Category:Bar charts]]
[[Category:Line graphs]]
[[Category:Statistics]]

2701: Change in Slope

2022-11-22T00:27:06Z

172.71.154.38: /* Explanation */ further caveat, will look for an example....

{{comic
| number = 2701
| date = November 21, 2022
| title = Change in Slope
| image = change_in_slope_2x.png
| imagesize = 656x371px
| noexpand = true
| titletext = Squinting at a graph is fine for getting a rough idea of the answer, but if you want to pretend to know it exactly, you neeed statistics.
}}

==Explanation==
{{incomplete|Created by a SIDEWAYS STATISTIC. Do NOT delete this tag too soon.}}

The comic is a tip for detecting changes in slopes over a {{w|scatter plot}} of data. This is a common requirement in exploratory statistics for comparing trends in a series — finding the cutoff where the slope changes may reveal valuable information about the data.

The comic compares two methods. Firstly, a novice method — by 'doing a bunch of statistics', applying various statistical tools to analyze the data and figure out the quantitative change in slope. This results in two equations for the trendlines above and below a given value, a box plot, a histogram and a line chart. It is unknown exactly what methods the novice used to figure out the change in slope in the data. Possibilities include calculating the [https://stackoverflow.com/a/45063636 derivatives] (which probably won't work well on noisy data such as shown), or the [https://stackoverflow.com/a/71744293 gradients], or using a [https://stackoverflow.com/a/47522444 Savitzky-Golay filter or piecewise linear smoothing spline fits].

The other is the so-called 'expert' method, which involves [https://cdn.discordapp.com/attachments/525939879805190154/1044395695525875712/xkcd_sideways.png tilting the page the graph is printed on to view changes in slope] better. For small changes in an underlying trend, similar to that apparently shown in the comic, direct visual inspection cannot always identify or even reveal the effect. The comic shows, however, that by taking the page and rotating it in just the right way, {{w|Perspective (graphical)|no longer flat on}} to the observer, a change in slope is more clearly visible to the naked eye. Ironically, tilting the comic to make the original' roughly resemble the perspective of the 'tilted' version graph shown in the comic shows that the right hand panel is slightly exaggerated for visual effect.

However, applying such an approach to data plots can run into errors — the primary one being parallax error from the oblique viewing angle causing the observer to not necessariy identify or clearly find the point at which the slope changes. It also does not reveal any data about the quantitative value of the change in slope, merely proving the existence of one. Furthermore, noisy data might show an apparent slope change which is not representative of an actual change in the underlying data, so even more advanced statistics testing the hypothesis of whether an apparent slope change is real may likely be a good idea.

The title text then goes on to say that, while such a trick is useful to identify that there is some change in slope, in order to ''pretend'' to know it exactly one must revert to statistics (the "novice method") to obtain some form of information, defeating some of the premise of the comic. This at least produces a semblence of statistical rigor although, once an answer appears obvious, data could be interpreted to reach an answer that you are now expecting rather than revealing something of more statistically useful significance.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:How to detect a change in the slope of your data

:[First column, on the left]
:Novice method:
:[A graph, with dots forming a rough line, math formulas, and sub graphs]
:Do a bunch of statistics

:[Second column, on the right]
:Expert method:
:[Perspective view of the previous graph, with the legend "Hey look, it bends here" and an arrow pointing to the graph]
:Tip the graph sideways

{{comic discussion}}
[[Category:Scatter plots]]
[[Category:Bar charts]]
[[Category:Line graphs]]
[[Category:Statistics]]

2701: Change in Slope

2022-11-22T00:19:24Z

172.71.154.38: /* Explanation */ copyedit

{{comic
| number = 2701
| date = November 21, 2022
| title = Change in Slope
| image = change_in_slope_2x.png
| imagesize = 656x371px
| noexpand = true
| titletext = Squinting at a graph is fine for getting a rough idea of the answer, but if you want to pretend to know it exactly, you neeed statistics.
}}

==Explanation==
{{incomplete|Created by a SIDEWAYS STATISTIC. Do NOT delete this tag too soon.}}

The comic is a tip for detecting changes in slopes over a {{w|scatter plot}} of data. This is a common requirement in exploratory statistics for comparing trends in a series — finding the cutoff where the slope changes may reveal valuable information about the data set.

The comic compares two methods. Firstly, a novice method — by 'doing a bunch of statistics', applying various statistical tools to analyze the data and figure out the quantitative change in slope. This results in two equations for the trendlines above and below a given value, a box plot, a histogram and a line chart. It is unknown exactly what methods the novice used to figure out the change in slope in the data. Possibilities include calculating the [https://stackoverflow.com/a/45063636 derivatives] or the [https://stackoverflow.com/a/71744293 gradients], or using a [https://stackoverflow.com/a/47522444 Savitzky-Golay filter or piecewise linear smoothing spline fits].

The other is the so-called 'expert' method, which involves [https://cdn.discordapp.com/attachments/525939879805190154/1044395695525875712/xkcd_sideways.png tilting the page the graph is printed on to view changes in slope] better. For small changes in an underlying trend, similar to that apparently shown in the comic, direct visual inspection cannot always identify or even reveal the effect. The comic shows, however, that by taking the page and rotating it in just the right way, {{w|Perspective (graphical)|no longer flat on}} to the observer, a change in slope is more clearly visible to the naked eye. Ironically, tilting the comic to make the original' roughly resemble the perspective of the 'tilted' version graph shown in the comic shows that the right hand panel is slightly exaggerated for visual effect.

However, applying such an approach to data plots can run into errors — the primary one being parallax error from the oblique viewing angle causing the observer to not necessariy identify or clearly find the point at which the slope changes. It also does not reveal any data about the quantitative value of the change in slope, merely proving the existence of one.

The title text then goes on to say that, while such a trick is useful to identify that there is some change in slope, in order to ''pretend'' to know it exactly one must revert to statistics (the "novice method") to obtain some form of information, defeating some of the premise of the comic. This at least produces a semblence of statistical rigor although, once an answer appears obvious, data could be interpreted to reach an answer that you are now expecting rather than revealing something of more statistically useful significance.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:How to detect a change in the slope of your data

:[First column, on the left]
:Novice method:
:[A graph, with dots forming a rough line, math formulas, and sub graphs]
:Do a bunch of statistics

:[Second column, on the right]
:Expert method:
:[Perspective view of the previous graph, with the legend "Hey look, it bends here" and an arrow pointing to the graph]
:Tip the graph sideways

{{comic discussion}}
[[Category:Scatter plots]]
[[Category:Bar charts]]
[[Category:Line graphs]]
[[Category:Statistics]]

2699: Feature Comparison

2022-11-19T03:28:32Z

172.71.154.38: /* Explanation */ assumption without any evidence

{{comic
| number = 2699
| date = November 16, 2022
| title = Feature Comparison
| image = feature_comparison_v2.png
| imagesize =
| noexpand = true
| titletext = Below the Web, and the Dark Web, a shadowy parallel world of Cybiko users trade messages on the Translucent Neon Plastic Web.
}}

==Explanation==
{{incomplete|Created by a MULTIHOMED MESH NODE. Do NOT delete this tag too soon.}}

This comic compares different remote communication services, including the relatively well-known {{w|Twitter}}, {{w|Discord}}, {{w|Mastodon (software)|Mastodon}}, {{w|Facebook}} (FB), {{w|Slack (software)|Slack}}, {{w|Signal (software)|Signal}}, {{w|Internet Relay Chat}} (IRC), {{w|Tumblr}}, {{w|Reddit}}, and {{w|SMS}} mobile telephone text messages. It also includes the less well-known {{w|Cybiko}}® wireless handheld computer for teens. For each of these, it purports to indicate which of various features they support. The comic illustrates how feature comparison charts/infographics can be abused by sellers who are trying to make their products look better than they really are, compared to their main competitors. The comic was likely inspired by the recent news coverage of Twitter's purchase by {{w|Elon Musk}}, and the subsequent mass firings and resignation of its staff, causing many users to start looking for alternatives.

The Cybiko was a handheld computer designed for teens and released in 2000, which featured its own two-way radio text messaging capabilities along with built-in games and a music player. Additional information about it is available at [http://cultureandcommunication.org/deadmedia/index.php/Cybiko the Dead Media Archive], as the device has not been manufactured since 2003. The chart suggests that the Cybiko has an advantage over all of the other listed communication services, as it is capable of all eight of the table's listed features listed, with none of the others being close. Purchasing a Cybiko or finding friends who own one can be its own challenge, as device was discontinued nearly 20 years ago. Additionally, the Cybiko is a ''device'' rather than a ''service''; a more fair comparison would be to a modern {{w|smartphone}}, which can provide most of these features via multiple apps, including those apps written especially for such rival services.

The features compared are {{w|Private message|direct messaging}}, {{w|group chat}}s, {{w|file transfer}}, built-in {{w|video game|games}}, instances of the software run by individual users instead of the corporation producing it, lack of a {{w|Server (computing)|central server}} requirement, {{w|mesh networking}}, and wireless message delivery without an active internet connection.

Mesh networking is a form of connectivity that reduces or removes the need for a centralized server or predefined gateways to a communications 'backbone'. Nodes communicate directly with any nodes that happen to be contactable, and from there may connect through to whatever nodes are in mutual contact, or to be found further afield, either in real-time or asynchronously. The Cybiko has this ability, as well as wireless message delivery because it communicates directly to other devices via radio, hence the ability to operate without any internet connectivity at all. There are several {{w|Comparison of software and protocols for distributed social networking|ongoing projects for distributed social networking}}, but all of these additionally require a hardware layer to provide signalling via their respective protocols. The Cybiko provides such via its decentralized radio capabilities.

The comic does not mention the downsides of the Cybiko, that being purchasing and finding friends who own one can be its own challenge, as it was discontinued nearly 20 years ago. Additionally, the comparison can be considered apples to oranges, since Cybiko is a ''device'' rather than a ''service''; a fairer comparison would be to a modern {{w|smartphone}}, which can provide most of these features via multiple apps, including ones written especially for such rival services. Even ignoring the above, some of the Cybiko's "advantages" come with their own drawbacks: while not requiring a central server nor the Internet, for example, is touted as a plus, the Cybiko instead relies on having other devices in proximity to relay messages, meaning unless the person you are sending to is nearby it will not function, which is not an issue of any of the other options.

This comic contains several errors. Mastodon doesn't require a central server, or support file transfer. Discord does not provide for user-run instances itself, only user-moderated and administrated instances. (There are two third party Discord server implementations, but it is unclear whether those could be counted as run by users.) Slack does not provide for user-run instances itself. Reddit does not provide for user-run instances at all, only user moderation and administration. IRC does require at least one central server,[https://www.rfc-editor.org/rfc/rfc1459.html] and relegates file transfer support to the domain of client extensions. Signal is heavily used in user-run instances via a diverse ecosystem of code forks; many of these don't require a central server, a couple use mesh networking. Reddit occasionally does have built-in games. Finally, Tumblr and SMS both have a form of group chats. An earlier version of the comic suggesting that Mastodon has no user-run instances was corrected by [[Randall]] shortly after publication of the original.

The title text refers to the translucent plastic covers that were popular in the late 1990s and early 200xs.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[A table with checkmarks to indicate which features various messaging services have. Each column is labeled with a service name and its logo beneath, except that for the last column, the device's longer name is written higher than all the other services' names, with an arrow pointing to a drawing of the device below it.]

{| class="wikitable"
|-
!
! Twitter
! Discord
! Mastodon
! FB
! Slack
! Signal
! IRC
! Tumblr
! Reddit
! SMS
! Cybiko® wireless handheld computer for teens (2000)
|-
! Direct messages
| ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓
|-
! Group chats
| ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || || ✓ || || ✓
|-
! File transfer
| || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || || ✓ || || ✓
|-
! Built-in games
| || ✓ || || ✓ || || || || || || || ✓
|-
! User-run instances
| || ✓ || ✓ || || ✓ || || ✓ || || ✓ || || ✓
|-
! Doesn't require central server
| || || || || || || ✓ || || || || ✓
|-
! Mesh networking
| || || || || || || || || || || ✓
|-
! Wireless message delivery works without internet
| || || || || || || || || || ✓ || ✓
|-
|}

{{comic discussion}}
[[Category:Charts]]
[[Category:Social networking]]

2699: Feature Comparison

2022-11-18T18:27:22Z

172.71.154.38: /* Explanation */ shorten ambox

{{comic
| number = 2699
| date = November 16, 2022
| title = Feature Comparison
| image = feature_comparison_v2.png
| imagesize =
| noexpand = true
| titletext = Below the Web, and the Dark Web, a shadowy parallel world of Cybiko users trade messages on the Translucent Neon Plastic Web.
}}

==Explanation==
{{incomplete|Created by a MULTIHOMED MESH NODE. Do NOT delete this tag too soon.}}

This comic compares different remote communication services, including the relatively well-known {{w|Twitter}}, {{w|Discord}}, {{w|Mastodon (software)|Mastodon}}, {{w|Facebook}} (FB), {{w|Slack (software)|Slack}}, {{w|Signal (software)|Signal}}, {{w|Internet Relay Chat}} (IRC), {{w|Tumblr}}, {{w|Reddit}}, and {{w|SMS}} mobile telephone text messages. It also includes the less well-known {{w|Cybiko}}® wireless handheld computer for teens. For each of these, it purports to indicate which of various features they support. The comic illustrates how feature comparison charts/infographics can be abused by sellers who are trying to make their products look better than they really are, compared to their main competitors.

The Cybiko was a handheld computer designed for teens and released in 2000, which featured its own two-way radio text messaging capabilities along with built-in games and a music player. Additional information about it is available at [http://cultureandcommunication.org/deadmedia/index.php/Cybiko the Dead Media Archive], as the device has not been manufactured since 2003. The chart suggests that the Cybiko has an advantage over all of the other listed communication services, as it is capable of all eight of the table's listed features listed, with none of the others being close. Purchasing a Cybiko or finding friends who own one can be its own challenge, as device was discontinued nearly 20 years ago. Additionally, the Cybiko is a ''device'' rather than a ''service''; a more fair comparison would be to a modern {{w|smartphone}}, which can provide most of these features via multiple apps, including those apps written especially for such rival services.

The features compared are {{w|Private message|direct messaging}}, {{w|group chat}}s, {{w|file transfer}}, built-in {{w|video game|games}}, user-run instances, lack of a {{w|computer server|central server}} requirement, {{w|mesh networking}}, and wireless message delivery without an active internet connection.

Mesh networking is a form of connectivity that reduces or removes the need for a centralized server or predefined gateways to a communications 'backbone'. Nodes communicate directly with any nodes that happen to be contactable, and from there may connect through to whatever nodes are in mutual contact, or to be found further afield, either in real-time or asynchronously. The Cybiko has this ability, as well as wireless message delivery because it communicates directly to other devices via radio, hence the ability to operate without any internet connectivity at all. There are several {{w|Comparison of software and protocols for distributed social networking|ongoing projects for distributed social networking}}, but all of these additionally require a hardware layer to provide signalling via their respective protocols. The Cybiko purportedly provides via its decentralized radio capabilities.

This comic contains several errors. Mastodon doesn't require a central server, or support file transfer. Discord does not provide for user-run instances itself, only user-moderated and administrated instances. (There are two third party Discord server implementations, but it is unclear whether those could be counted as run by users.) Slack does not provide for user-run instances itself. Reddit does not provide for user-run instances at all, only user moderation and administration. IRC does require at least one central server,[https://www.rfc-editor.org/rfc/rfc1459.html] and relegates file transfer support to the domain of client extensions. Signal is heavily used in user-run instances via a diverse ecosystem of code forks; many of these don't require a central server, a couple use mesh networking. Reddit occasionally does have built-in games. Finally, Tumblr and SMS both have a form of group chats. An earlier version of the comic suggesting that Mastodon has no user-run instances was corrected by [[Randall]] shortly after publication of the original.

The title text refers to the translucent plastic covers that were popular in the late 90's and early 00's.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[A table with checkmarks to indicate which features various messaging services have. Each column is labeled with a service name and its logo beneath, except that for the last column, the device's longer name is written higher than all the other services' names, with an arrow pointing to a drawing of the device below it.]

{| class="wikitable"
|-
!
! Twitter
! Discord
! Mastodon
! FB
! Slack
! Signal
! IRC
! Tumblr
! Reddit
! SMS
! Cybiko® wireless handheld computer for teens (2000)
|-
! Direct messages
| ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓
|-
! Group chats
| ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || || ✓ || || ✓
|-
! File transfer
| || ✓ || ✓ || ✓ || ✓ || ✓ || ✓ || || ✓ || || ✓
|-
! Built-in games
| || ✓ || || ✓ || || || || || || || ✓
|-
! User-run instances
| || ✓ || ✓ || || ✓ || || ✓ || || ✓ || || ✓
|-
! Doesn't require central server
| || || || || || || ✓ || || || || ✓
|-
! Mesh networking
| || || || || || || || || || || ✓
|-
! Wireless message delivery works without internet
| || || || || || || || || || ✓ || ✓
|-
|}

{{comic discussion}}
[[Category:Charts]]
[[Category:Social networking]]

Talk:2699: Feature Comparison

2022-11-17T19:13:59Z

172.71.154.38: reply

The image has changed. Now Mastodon includes USER-RUN INSTANCES (though I believe it should also have a check next to DOESN'T REQUIRE CENTRAL SERVER).

I tried googling "wikipedia feature comparison chart". Instead of finding a page explaining how these charts work, I got a chart comparing different wiki softwares. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 23:22, 16 November 2022 (UTC)

Of course, it wouldn't be hard to make apps on smartphones support mesh networks ... however, the manufacturers and app developers prefer to work hard to make sure they don't work without being connected to internet and serving advertisement. [https://en.wikipedia.org/wiki/Wi-Fi_Direct Although ...] -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 00:25, 17 November 2022 (UTC)

There seems to be a lot of wrongness about this matrix. Besides that mastodon instances can be run by user (which is fixed):
* Mastodon does not support file transfer. You can only upload images, and ''not'' even all image formats—webp is not supported. Some other ActivityPub servers support file upload, but then it's not Mastodon.
* IRC also doesn't support file transfer afaik.
* Mastodon and SMS don't require a central server
* Discord, Reddit, and Slack doesn't have user-run instances
* Discord doesn't have builtin games last time I checked. The games are by the bots,

I don't know about Slack, but pretty much all of Discord and Reddit is user-run/moderated instances.
:That slash is doing a lot of work there. [[Special:Contributions/172.69.34.31|172.69.34.31]] 06:57, 17 November 2022 (UTC)
:Your definition for "instance" must be very different from mine then. For me, "instance" refer to the server software's instance; that is, the user must be able to run the server software on their own to qualify this. If you consider subreddits and discord chat rooms (I refuse to call them "servers", because that's not what they are) as "user-run instances", then so are Facebook groups, right? Those are not instances; they're just communities or groups moderated by some selected people. --[[Special:Contributions/172.71.215.3|172.71.215.3]] 12:55, 17 November 2022 (UTC)

"IRC itself is a teleconferencing system, which (through the use of the client-server model) is well-suited to running on many machines in a distributed fashion. A typical setup involves a single process '''(the server) forming a central point''' for clients (or other servers) to connect to, performing the required message delivery/multiplexing and other functions." – J. Oikarinen, D. Reed; Internet Relay Chat Protocol; RFC 1459; May 1993. Emphasis added. [[Special:Contributions/172.71.154.158|172.71.154.158]] 01:45, 17 November 2022 (UTC)

Notably, Mastodon ''eschews'' file transfer - audio specifically - for fear of enabling piracy (issue #7495). Tumblr would have a more comprehensive version of file transfer.
[[Special:Contributions/172.71.146.136|172.71.146.136]] 03:17, 17 November 2022 (UTC)

IRC has (X)DCC for File Transfers and for it's centralisation it depends on the deployment, the original network that became EFNet (Eris-Free Network) doesn't have a central server, but things like Libera and OFTC have centralised services for authentication and servers maintained by only one organisation. Btw for games on the fediverse (which Mastodon is part of) Misskey includes some, sadly they're centralised. [[User:Lanodan|Lanodan]] ([[User talk:Lanodan|talk]]) 03:40, 17 November 2022 (UTC)

Tumblr does have group chats. They're publicly viewable by anyone, but only people in the group can send messages, so I think they still count as group chats.

It appears we are all having a [[386]] moment watching Randall finally be wrong about something. How dare he?! [[Special:Contributions/172.70.111.30|172.70.111.30]] 05:37, 17 November 2022 (UTC)
: Nobody wants to put this train wreck into the explanation, but someone has to. I'm guessing we're waiting for further corrections just in case.
[[Special:Contributions/172.69.34.31|ki172.69.34.31]] 06:57, 17 November 2022 (UTC)

Discord did add games recently: https://discord.com/blog/server-activities-games-voice-watch-together
[[User:Spenc|Spenc]] ([[User talk:Spenc|talk]]) 07:28, 17 November 2022 (UTC)

He also just left out Matrix entirely, y'know I'm starting to think this isn't a serious comparison. --[[Special:Contributions/172.70.250.193|172.70.250.193]] 07:42, 17 November 2022 (UTC)

Not sure what built-in would mean, but Slack has plenty of games you can install on it as an admin (Similar to Discord) [[Special:Contributions/172.70.162.223|172.70.162.223]] 09:52, 17 November 2022 (UTC)

Also on April fool's days Tumblr occasionally have some sort of built-in game [[Special:Contributions/172.70.162.46|172.70.162.46]] 09:54, 17 November 2022 (UTC)
:xkcd has those too :p --[[Special:Contributions/172.71.215.3|172.71.215.3]] 12:55, 17 November 2022 (UTC)

I'm wondering if we shouldn't include in the explanation, besides (on instead of) the link to {{Wikipedia|Mesh networking}}, also a link to {{Wikipedia|Comparison of software and protocols for distributed social networking}}. --[[User:Waldir|Waldir]] ([[User talk:Waldir|talk]]) 10:34, 17 November 2022 (UTC)

I can't help to notice phpBB is so dead it's not even on this chart. -- Shirluban [[Special:Contributions/172.71.122.79|172.71.122.79]] 10:37, 17 November 2022 (UTC)

I agree that the table is riddled with a surprising number of errors, but if the conspiracy theory that Randall has been replaced by another, evil cartoonist (as I write, the head of this explanation) is meant to be funny ... it didn't seem amusing to this particular explainer. [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 12:55, 17 November 2022 (UTC)
: It wasn't meant to be funny, it was meant to explain the comic. How much fake news about fake news about fake news do we need before we talk about it? It's clear to anybody who can tell how severe the mistakes are, that this is what the comic is about. [[Special:Contributions/172.70.111.29|172.70.111.29]] 15:10, 17 November 2022 (UTC)

While I'm sure this could start a holy war in its own right, if you include MMS under the umbrella of SMS, you get sort-of file transfers and also group chats. [[User:Jpatterson|Jpatterson]] ([[User talk:Jpatterson|talk]]) 14:12, 17 November 2022 (UTC)

If you think about the difference between user *run* instances vs user *hosted* instances, that might explain why Discord, Reddit, and Slack all have that check. However, I can't think of a possible reason why Mastodon is missing "Doesn't require central server" when that is its main selling point. :shrug: [[Special:Contributions/108.162.246.67|108.162.246.67]] 14:59, 17 November 2022 (UTC)

Somebody reverted my change that IRC does not require a central server, but it doesn't. The protocol has clients connecting to _one_ server among a _network_ of interconnected servers, where anybody can run such a network. [[Special:Contributions/172.70.111.29|172.70.111.29]] 15:10, 17 November 2022 (UTC)
: There's still going to be centralization of administration even among federated nets of IRC servers, unlike USENET for example. [[Special:Contributions/172.69.33.168|172.69.33.168]] 15:31, 17 November 2022 (UTC)

Are we encountering a new kind of vandalism where plausible edits are made introducing terrible prose, typos, and falsehoods? I noticed something similar happened with the recent Y2K comic. I really don't like to log in because we usually show we can do good work with most people logged out and IP's CDN-obfusticated for actual mass anonymity, but I will absolutely log in and push for page protection if vandals start trying to get insidious with subterfuge. [[Special:Contributions/172.69.33.168|172.69.33.168]] 15:31, 17 November 2022 (UTC)
:I don't know what vandalisms you're referring to. I've been adding the "Intermediate Edits", mostly behind HTML comments while fine-tuning so as not to make it look awful during the time I know it'll be half-completed (or less!).
:As to terrible prose, I cannot refute the possibility that I'm guilty of that. I do my best, but genuine typos or personal proclivities for purple prose may indeed creep in.
:With falsehoods, nothing I have added (or changed) is deliberately wrong, but may be not the same interpretation as someone else. I'm somewhat handicapped by not being a (regular/registered) user of most of the services (and may understand, e.g., Mesh Networking only in a form that a modern re-envisaging of it has moved drastically away from), but I've been taking my cues from only the very best external references (or Wikipedia!) and trying to boil down the supernumary technicalities to a more Explainxkcd-friendly format.
:As always, another editor with a genuinely better idea (in all those aspects) can refine things. As, I notice, has already been started. Didn't get an Edit Conflict, which I put down to being short and sharp in my insertions, and hope I caused not too many for others. - Taking a break from imposing my own edits, now. I shall deal with any further changes (or reversions) in good heart when I get the time again, later. Good luck and good editing to those who wish to pick up any of the work (or rework it) in the meantime. [[Special:Contributions/172.70.91.53|172.70.91.53]] 15:58, 17 November 2022 (UTC)

I think some of you missed the forest for the trees. The point of the comic is to illustrate how feature comparison charts, which are very common sales tools, might be abused to show that the seller's product looks better than it really is. That should be in the explanation of the comic. [[Special:Contributions/172.70.210.243|172.70.210.243]] 17:27, 17 November 2022 (UTC)
: Agreed, there are a lot of the points that could be debated. Is "central server" meant a server not controlled by you? What is a user-run instance? As twitter has several clients available but is listed without "User-run instances". I bet cybiko is trending on google search right now. [[User:Harald|Harald]] ([[User talk:Harald|talk]]) 17:33, 17 November 2022 (UTC)
::Sort of https://trends.google.com/trends/explore?date=now%207-d&q=cybiko [[Special:Contributions/172.71.154.38|172.71.154.38]] 19:13, 17 November 2022 (UTC)

2699: Feature Comparison

2022-11-17T07:10:57Z

172.71.154.38: /* Explanation */ ce

2694: Königsberg

2022-11-09T03:22:15Z

172.71.154.38: /* Explanation */ sounds better

{{comic
| number = 2694
| date = November 4, 2022
| title = Königsberg
| image = konigsberg_2x.png
| imagesize = 448x343px
| noexpand = true
| titletext = At first I thought I would need some gold or something to pay him, but then I realized that it was the 18th century and I could just bring a roll of aluminum foil.
}}

==Explanation==
{{incomplete|Created by a WOLF, TWO GOATS, AND THREE BAGS OF GRAPH NODES. Do NOT delete this tag too soon.}}

[[File:Konigsberg_bridges.png|frame|right|{{w|Königsberg}}, Prussia in Euler's time, showing the Pregel river and its seven bridges. Two of the original seven bridges no longer exist,[https://goo.gl/maps/ChdBoeQMr3AQPi446] although there are three new bridges. The Baltic port city is now Kaliningrad, a Russian exclave.]]

This comic is about the {{w|Seven Bridges of Königsberg}}, a seminal {{w|graph theory}} problem solved by the famous mathematician {{w|Leonhard Euler}}.[https://www.maa.org/press/periodicals/convergence/leonard-eulers-solution-to-the-konigsberg-bridge-problem] The problem was whether a path through the city crossing each of the seven bridges just once exists, without crossing the river forks any other way. In 1736, Euler proved that no such path exists. This result is considered to be the first theorem of graph theory and the first proof in the theory of networks[http://www-personal.umich.edu/~mejn/courses/2004/cscs535/review.pdf] — a subject now generally regarded as a branch of {{w|combinatorics}} — and presaged the development of {{w|topology}}. Combinatorial problems of other types had been considered since antiquity. {{w|Graph (discrete mathematics)|Graphs}} are a data structure common in many algorithmic problems in computer science.

[[Cueball]] attempts to cheat on the final exam in his algorithms class by traveling back in time to commission the construction of an eighth bridge before Euler could learn of the problem, allowing a trivial solution that would remove the rationale for further analysis. He hopes that this would alter his present-day timeline in such a way that the test becomes easier because graph theory might never have been developed. The use of the word "tried" implies failure, which is probably a good thing since his success would create a {{w|Temporal_paradox#Grandfather_paradox|paradox}}. [[:Category:Time travel|Time travel]] is a recurring topic on xkcd and examples where attempts to change the past fails has also been used before like in [[1063: Kill Hitler]].

With the addition of the eighth bridge, it becomes possible to cross each bridge exactly once, starting at the north bank and ending on the larger eastern island, or vice-versa. However, there is still no way to traverse each bridge exactly once and return to the starting point, because the altered graph would have an {{w|Eulerian trail|Euler trail}} but not an Euler cycle. Thus the problem might still have been interesting to Euler.{{Citation needed}} (Adding a ninth bridge connecting the north bank to the east island would render the problem completely trivial.) We can't say whether Euler or others would have developed graph theory anyway, or whether Cueball's exam would have been any easier or more difficult.

An alternative modification allowing an easy solution is to remove bridges. During World War II, two bridges to the central island connecting it to the north and south banks were destroyed by bombing, so today there is an Eulerian trail across the five remaining bridges.

The title text alludes to the fact that ordinary {{w|aluminum foil}}, which was not commercially available until 1911, would have been a tremendously valuable curiosity in the 18th century, which didn't even have {{w|tin foil}}. Aluminum was a highly priced metal before the 1880s when inexpensive methods were developed to refine it. The {{w|Washington Monument#Aluminum_apex|Washington Monument}} was constructed with a tip made of pure aluminum due to its value and conductive capacity. Aluminum had not been extracted in its pure form at the time of Euler, and was known only in compounds such as {{w|alum}}, so the metal would have been unique and exotic. The value of aluminum and the use of it as the tip of the Washington Monument was also mentioned in [[1608: Hoverboard]] where a heist to steal the tip is [https://www.explainxkcd.com/wiki/images/6/6f/1608_0995x1083y_Tip_of_Washington_monument.png depicted].

==Transcript==
:[Cueball, standing next to two men wearing wigs, pointing with a pointer at a map showing the seven bridges problem, with an extra bridge added in dashed lines]
:Cueball: Lord Mayor of Königsberg, I will reward you handsomely if you construct this bridge before my friend Leonhard arrives.

:[Caption below the panel:]
:I tried to use a time machine to cheat on my algorithms final by preventing graph theory from being invented.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring real people]]
[[Category:Time travel]]
[[Category:Math]]
[[Category:Programming]]

2694: Königsberg

2022-11-05T05:09:19Z

172.71.154.38: /* Explanation */ "of course" is exactly wrong here; cleanup and make more plausible

{{comic
| number = 2694
| date = November 4, 2022
| title = Königsberg
| image = konigsberg_2x.png
| imagesize = 448x343px
| noexpand = true
| titletext = At first I thought I would need some gold or something to pay him, but then I realized that it was the 18th century and I could just bring a roll of aluminum foil.
}}

==Explanation==
{{incomplete|Created by a FOX, TWO CHICKENS, AND THREE BAGS OF GRAIN. Do NOT delete this tag too soon.}}

[[File:Konigsberg bridges.png|frame|right|{{w|Königsberg}} in Euler's time, showing the river Pregel and its seven bridges]]

This comic is about the {{w|Seven Bridges of Königsberg}}, a seminal {{w|graph theory}} problem addressed by the famous mathematician {{w|Leonhard Euler}}. A popular pursuit, beforehand, was to attempt to devise a path through the city that would cross each of the seven bridges exactly once, without crossing the river forks any other way. In 1736, Euler proved that there was no actual solution possible. This result is considered to be the first theorem of graph theory and the first proof in the theory of networks[http://www-personal.umich.edu/~mejn/courses/2004/cscs535/review.pdf] — a subject now generally regarded as a branch of {{w|combinatorics}} — and presaged the development of {{w|topology}}. Combinatorial problems of other types had been considered since antiquity.

[[Cueball]] attempts to cheat on the final exam in his algorithms class by traveling back in time to commission the construction of an eighth bridge before Euler could learn of the problem, granting it a trivial solution that would remove much impetus for mathematical analysis. He hopes that this would alter his present-day timeline in such a way that the test becomes easier because graph theory might never have been developed. With the addition of the eighth bridge, it becomes possible to create a path that crosses each bridge exactly once, starting at the north bank and ending on the eastern island (or vice-versa). However, there would remain no way to traverse each bridge exactly once and return to your starting point, because the altered graph would have an {{w|Euler trail}} but not an {{w|Euler cycle}}. Thus, the problem might still have been sufficiently interesting to spark Euler's curiosity. Adding a ninth bridge connecting the north bank to the east island would render the problem completely trivial. Without the seven bridges problem, Euler could have focussed on a different foundation for graph theory, possibly making an even harder examination in Cueball's time.

The title text alludes to the fact that ordinary {{w|aluminum foil}}, which was not commercially available until 1911, would have been a tremendously valuable curiosity in the 18th century, which didn't even have {{w|tin foil}}. Aluminium itself was a highly priced metal before the 1880s, when methods were developed to cheaply refine it. Famously, the {{w|Washington Monument}} was constructed with a tip made of pure aluminum due to its great value and conductive capacity. Aluminum had not even been extracted in its pure form at the time of Euler, and was only known in compounds such as {{w|alum}}, so it would have been rare and exotic indeed.

{{clear}}

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Cueball, standing next to two men wearing wigs, pointing with a pointer at a map showing the 7 bridges problem, with an extra bridge added in dashed lines]
:Cueball: Lord mayor of Königsberg, I will reward you handsomely if you construct this bridge before my friend Leonhard arrives.

:[Caption below the panel]
:I tried to use a time machine to cheat on my algorithms final by preventing graph theory from being invented.

{{comic discussion}}
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring real people]]
[[Category:Math]]
[[Category:Programming]]