explain xkcd - User contributions [en]

2972: Helium Synthesis

2024-08-15T18:05:17Z

172.68.23.74: /* Explanation */ I think this got taken out at some point, but it's in the comic specifically

{{comic
| number = 2972
| date = August 14, 2024
| title = Helium Synthesis
| image = helium_synthesis_2x.png
| imagesize = 740x312px
| noexpand = true
| titletext = Our lawyers were worried because it turns out the company inherits its debt from the parent universe, but luckily cosmic inflation reduced it to nearly zero.
}}

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

This comic explores the challenges of obtaining {{w|helium}}. [[Hairy]] is leading a company meeting with [[Megan]], [[Cueball]], and [[Hairbun]], who are discussing the recurring problem of {{w|helium shortage}}s, a real-world issue due to helium's limited availability on Earth. Helium is a non-renewable resource extracted from {{w|natural gas}} deposits, and its scarcity can affect industries that rely on it, such as medical imaging, semiconductor manufacturing, scientific research, and party balloon supplies.[https://www.marketplace.org/2023/01/19/heliums-been-rising-in-price-and-its-bringing-businesses-down/] (See also [[2766: Helium Reserve]].)

Hairbun suggests investigating the origin of helium. Cueball's research reveals that most helium in the universe came from {{w|Big Bang nucleosynthesis}}, which occurred shortly after the {{w|Big Bang}} when the first elements were formed. (However, 99% of the helium here on Earth has been produced from the {{w|radioactive decay}} of {{w|uranium-238}} and {{w|thorium-232}}—which in turn came from {{w|r-process}} {{w|Supernova nucleosynthesis|nucleosynthesis}} inside merging {{w|neutron star}}s;[https://svs.gsfc.nasa.gov/13873/] see [[2826: Gold]]—into {{w|alpha particles}} identical to temporarily ionized helium, with only the remaining one percent originating from the Big Bang.)

Hairy assigns the team to figure out how to recreate Big Bang nucleosynthesis, which is not actually possible for a contemporary business organization.{{cn}} Nonetheless, the team builds a machine capable of it. While one might hope they would realize activating it would obliterate them along with at least all the closest galaxies, grimly that disadvantage seems to escape their attention in the tightly focused drive towards their ill-fated mission.

The final panels show the creation of a second Big Bang, and the following 14 billion years into the future, culminating with the same characters in the same meeting, presumably having arisen from an identical series of post-Big Bang events as had occurred in the original universe, only to arrive at the same predicament: helium shortages are still a problem, and they still need a reliable source. That such an extreme solution didn't actually solve the problem shows the impracticality of their plan, suggesting that some problems are too complex or vast to solve through uncritical brainstorming by corporations.

The title text is a wordplay on the concept of {{w|cosmic inflation}}, a theory in cosmology that describes the rapid expansion of the universe just after the Big Bang. The joke imagines the company as having inherited a debt from the parent universe, perhaps due to the expense of creating a second Big Bang. However, thanks to cosmic inflation which dramatically expanded the universe, the debt was diluted (perhaps across the vastness of space), reducing it to almost nothing—much like how {{w|monetary inflation}} reduces the relative cost of debt in fiscal terms. (See also [[2688: Bubble Universes]].)

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Hairy sits on an office chair at the head of a conference table and has his hands on the table, with Cueball and Megan also at the table.]
:Hairy: These helium shortages every few years are such a pain.
:Hairy: Our company needs a reliable source of helium.

:[The same situation, but now Hairbun is also seen at the table on the left side of Cueball. Cueball holds a cellphone in his left hand, which Megan looks at.]
:Hairbun: Where does helium come from, anyway?
:Cueball: Hmm, apparently most of it is from "Big Bang nucleosynthesis"?
:Hairy: Well, let's figure out how to do that.

:[Hairy, Megan and Hairbun are working on a large machine labeled "Big Bang Nucleosynthesis," with Megan holding its wired control device in her left hand.]

:[Two panels depict another Big Bang, followed by various stages of cosmic development, including galaxies and planets forming, shown in white on a black background.]

:[The scene returns to the same conference room setup as before, with the characters in the same positions. Text at the top reads: "14 Billion Years Later."]
:Hairy: These helium shortages every few years are such a pain.
:Hairy: Our company needs a reliable source of helium.

{{comic discussion}}
[[Category:Comics featuring Hairy]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Hairbun]]
[[Category:Comics with inverted brightness]]
[[Category:Cosmology]]
[[Category:Physics]]
[[Category:Recursion]]

2971: Celestial Event

2024-08-13T04:55:37Z

172.68.23.74:

{{comic
| number = 2971
| date = August 12, 2024
| title = Celestial Event
| image = celestial_event_2x.png
| imagesize = 471x300px
| noexpand = true
| titletext = If we can get a brood of 13-year cicadas going, we might have a chance at making this happen before the oceans evaporate under the expanding sun.
}}

==Explanation==
{{incomplete|Created by a BOT THAT APPEARS EVERY FOUR BILLION YEARS - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic multiplies the fraction of time that selected classes of celestial events occur in the sky over a particular location on the Earth's surface, in this case, Cambridge, Massachusetts, where the cartoonist was living when this comic was published. The resulting product is the expected frequency that all of them would occur at the same time at that location. The value he calculates is once every 4.3 billion years. This is in the same ballpark as the current age of the Earth, about 4.5 billion years.

Conversion of "days" and "months" to fractional years, required for conservation of units in the equation, is ambiguous as presented due to the leap year phenomenon and the inconsistent number of days in a month. Differing values for these fractional years yield a range of frequency solutions between 4.2 and 4.4 billion years. If the value for days in a year is given as 365.25 (the mean value for all years, ignoring infrequent additional 'leap year' corrections), as in the first term of the equation ((20/365.25)/11), and the mean value for days in two months is given as 60.9 as in the second term ((60.9/365.25)/50), the result is 4.2995 *10^9 years.

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

{{comic discussion}}

2967: Matter

2024-08-04T07:01:02Z

172.68.23.74: /* Explanation */ rm redundant

{{comic
| number = 2967
| date = August 2, 2024
| title = Matter
| image = matter_2x.png
| imagesize = 234x341px
| noexpand = true
| titletext = He was the first person to land a 900, which is especially impressive because pulling off a half-integer spin requires obeying Fermi-Dirac statistics.
}}

==Explanation==
{{incomplete|Created by a GOOFY FRONTSIDE WIKI GRIND TO SECRET PHYSICS DEMO TAPE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In {{w|skateboarding}}, the term 'goofy' means to push with the left foot, using the {{w|Footedness#Goofy_stance|opposite stance}} to standard footing, a stance pushing with one's right foot. The comic uses this as a analogy for {{w|antimatter}} in particle physics, which exhibits the opposite charge to ordinary matter and will destroy both upon collision, releasing energy proportional to their combined mass in a process called annihilation. {{w|Tony Hawk}}, a professional skateboarder of great renown, has apparently obtained a professorship and is teaching this very non-standard theory. Professor Hawk's appearance could be a play on the name of {{w|Stephen Hawking}}, a famous astrophysicist and professor at the University of Cambridge before his death in 2018. As Tony Hawk does not have a degree in physics, teaching inaccurate lessons would be a likely pitfall of his professorship.

This analogy also indirectly raises the problem of {{w|baryon asymmetry}}, in which ordinary matter appears to be much more common than antimatter, unlike most{{citation needed}} distributions of handedness, chemical {{w|chirality}}, or the {{w|skewness}} of {{w|Multimodal_distribution|bimodal statistics}} describing asymmetries in nature (called {{w|homochirality}}, e.g., organ shape and centering, or plants favoring one branch over the other at a fork) and in artificial methods, because 'goofy-footed' skateboarders are about as common as those using standard footing. The baryon asymmetry is currently thought to have resulted from inhomogeneities, or fluctuations, during {{w|Inflation (cosmology)|cosmological inflation}} which occured between 10−33 and 10−32 seconds after the Big Bang.

The title text describes Hawk as the first person to "land a 900," meaning the successful completion of a {{w|900 (skateboarding)|skateboarding trick}} involving two and a half rotations, or nine hundred degrees (2.5 × 360° = 900°). In physics, {{w|Spin (physics)|spin}} is a {{w|quantum number}} describing subatomic particles (see [[1862: Particle Properties]]), named for the vaguely analogous ''but crucially distinct'' concept of {{w|angular momentum}} in classical physics. Obeying {{w|Fermi–Dirac statistics}} requires that the particles involved are {{w|fermion}}s, which include all of the electrons, protons and neutrons that comprise the entirety of everyone's mass and electrochemical state. Fermions all have {{w|half-integer}} (i.e., ...–1½, –½, ½, 1½...) {{w|spin quantum number}}s which do indeed include 2½, but only extremely rare particles have a spin of 5/2.[https://physics.aps.org/articles/v7/s137] However, it's very important to remember that [https://www.youtube.com/watch?v=pYeRS5a3HbE&ab_channel=ScienceClicEnglish quantum mechanical spin is ''not'' rotation, but how quickly the corresponding particle changes state when rotated.]

While everyone and most everything we ordinarily interact with except light and cosmic rays are comprised entirely of fermions, {{w|Boson#Composite_bosons|any composite particle made of an even number of fermions, including entire atoms and their nuclei, are not fermions}} but {{w|boson}}s, which do ''not'' obey Fermi–Dirac statistics. Luckily, landing a 900 does not actually require obedience to Fermi–Dirac statistics, because a skateboarder comprised entirely of bosonic atoms would still have fermionic electrons in the orbitals of those atoms, and thus would still obey the far more macroscopically fundamental and consequential {{w|Pauli exclusion principle}}. That principle gives mostly empty atoms the property of substance, allowing you to hold things, walk, make sound waves with your voice, employ any mechanical property of matter, and gives a sufficiently skilled skateboarder the ability to land a 900.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Tony Hawk (drawn with short hair) gesturing at a narrow whiteboard on which illegible things are marked, what may be a Feynman diagram with one of the particle/antiparticle pair going into a circle (possibly representing a black hole, and thus depicting the popularized (incorrect) analogy for {{w|Hawking radiation}}), and at the bottom, a 2x3 table of illegible values.]
:Tony Hawk: In the standard model, regular matter will annihilate if it comes in contact with oppositely-charged ''goofy'' matter.

:[Caption below the panel:]
:Tony Hawk becomes a physics professor

{{comic discussion}}

[[Category:Comics featuring real people]]
[[Category:Physics]]
[[Category:Statistics]]

2963: House Inputs and Outputs

2024-07-25T20:09:27Z

172.68.23.74: ce

{{comic
| number = 2963
| date = July 24, 2024
| title = House Inputs and Outputs
| image = house_inputs_and_outputs_2x.png
| imagesize = 740x684px
| noexpand = true
| titletext = People think power over ethernet is so great, and yet when I try to do water over ethernet everyone yells at me.
}}

==Explanation==
{{incomplete|Created by a possible reference to [[1037: Umwelt]] in panel 16 - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

This is another comic in a series depicting {{w|confusion matrix|confusion matrices}}, similar to [[2420: Appliances]], [[2813: What To Do]] and [[1890: What to Bring]]. It is arranged as a table of five columns of conduits to and from a house, by five rows of resources and people, each of which typically enter, exit or both enter ''and'' exit the house via a least one of the identified conduits. The table cells have a green background for compatible methods of transit and a red tint is used for the more problematic pairings. Each panel can be read as "[row label] [entering and/or exiting] the house via the [column label]", for example, "Fresh water entering the house via the well".

{| class="wikitable" style="background-color: lightpink;"
|+ House Inputs and Outputs
! !! Well !! Garage !! Power lines !! Front door !! Septic tank
|-
! Fresh water (Input)
|style="background-color: palegreen;"| The purpose of a well is usually to pump fresh water into the home, primarily for drinking or washing. It may be unnecessary in many places if a reliable {{w|water supply network}} is available. || Long gone are the days of {{w|Labours_of_Hercules#Fifth:_Augean_stables|having to clean up after your primary mode of transportation}}, for most people. || Water either shouldn't, or cannot be carried through electrical lines. || Many people prefer to control the amount of water they get, and the water may damage things inside the house. || Most people don't want anything they drink to contain (or go through pipes that have contained) sewage.
|-
! Cars (Input/Output)
| Most cars manufactured in recent years can't fit inside a well.
|style="background-color: palegreen;"| Garages are in fact built for the storage of cars and other similarly-sized vehicles. Placing a car in one will both help protect it from the elements and make it easier to access from inside your own home. || As of yet, cars cannot be transferred through power lines and require roads to travel on. However, this could significantly reduce travel costs. || Most cars can’t fit through doors, apart from the garage door. || Comedian {{w|Garrison Keillor}}'s 2008 ''More News from Lake Wobegon'' includes a story where an old septic tank is discovered to actually be a buried car.[https://theseriouscomedysite.com/comedy-cd-or-download/garrison-keillor-more-news-from-lake-wobegon/]
|-
! Electricity (Input)
| Wells are not a source of electric power, and attempting to obtain electricity from a well would likely contaminate its water supply. || In the United States, lightning is responsible for causing around 24,600 structure fires annually, resulting in $8 to $10 billion in losses.
|style="background-color: palegreen;"| Power lines are designed to facilitate the connection of individual homes to the broader local power network. [[Randall]] omits the fact that electricity can also be an output; e.g. houses with solar panels regularly export electricity too. || {{w|Benjamin Franklin}} invented the {{w|lightning rod}} to prevent lightning strike damage to structures. || As Knit Cap observes, septic tanks are not a source of electric power.
|-
! People (Input/Output)
|style="background-color: lightpink"| This depicts a view from inside a well, a very dangerous place for most people.{{Citation needed}} As a [[:Category:Comics with inverted brightness|dark scene]], it is drawn red-on-black. The motif resembles poster art for the 2002 horror movie remake ''{{w|The Ring (2002 film)|The Ring}}'', which involves a girl left to die in a well who becomes a vengeful ghost (see also [[396: The Ring]]).
|style="background-color: palegreen;"| A person can enter and exit their home through a garage door, provided the garage has an internal door to the rest of the home. Not the best way to welcome guests though. || Overhead power lines to homes are generally not strong enough to climb, and attempting to do so incurs a very serious risk of electrocution.
|style="background-color: palegreen;"| The front door of a home is designed for entry and exit of humans and similarly sized items. || In general, people find crawling through waste unwanted. Also, the septic tank is not connected to the street.
|-
! Sewage (Output)
| Sewage in drinking water can cause disease. It is/was the main cause for most {{w|cholera}} epidemics.
|colspan=3| Sewage spills are smelly, disgusting, hard to clean, and can destroy carpets, floors, drywall, and property value.
|style="background-color: palegreen;"| A {{w|septic tank}} is an underground chamber through which wastewater flows for basic {{w|sewage treatment}}.
|}

The title text references {{w|Power over Ethernet|power over ethernet (PoE)}}, first implemented in the early 2000s, which passes electric power along with data on twisted-pair Ethernet cabling. This is a welcome development, as it removes the need for many lower-power network-connected devices to have independent power supplies, usually simplifying their installation and relocation. While networked water delivery ("running water") is also a welcome development, doing so over ethernet cables would be disastrous, risking the destruction of linked electronic devices (nearly all of which are water-intolerant) while not providing enough water for 'normal' use. Randall would get off easy if he were merely to be yelled at. However, fast electric vehicle charging cables are sometimes water-cooled.[https://www.connectortips.com/where-liquid-cooled-connectors-and-connectors-for-liquid-cooling-used-in-evs-faq/]

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

:[A 5x5 grid of squares. The columns are labeled: Well, Garage, Power lines, Front door, Septic tank. Each row's label has an arrow and a house next to it. The rows are: Fresh water (horizontal arrow towards house), Cars (two-directional horizontal arrow and house), Electricity (horizontal arrow into house), People (two-directional horizontal arrow and house), Sewage (vertical arrow out of bottom of house).]

:Well, Fresh water: [green]
::Voice from house: Mmm! Refreshing!

:Garage, Fresh water: [red]
::''Fwoosh''

:Power lines, Fresh water: [red]

:Front door, Fresh water: [red]
::Voice from house: Stop it!
::''Fwoosh!''

:Septic tank, Fresh water: [red]
::Voice from house: Eww.

:Well, Cars: [red]

:Garage, Cars: [green]

:Power lines, Cars: [red]

:Front door, Cars: [red]
::Voice from car: Do you think I scratched the paint?

:Septic tank, Cars: [red]

:Well, Electricity: [red]
::Cueball's laptop: ⚠Low battery

:Garage, Electricity: [red]
::''BOOM''

:Power lines, Electricity: [green]

:Front door, Electricity: [red]
::''BOOM''

:Septic tank, Electricity: [red]
::Knit Cap: Why won't my console turn on?

:Well, People: [red (and black)]

:Garage, People: [green]
::Cueball: Bye!

:Power lines, People: [red]
::Cueball: Bye!

:Front door, People: [green]
::Cueball: Bye!

:Septic tank, People: [red]
::Cueball: Bye!

:Well, Sewage: [red]
::Voice from house: ''Why do I keep getting sick???

:Garage, Sewage: [red]
::Cueball: Oh no.

:Power lines, Sewage: [red]
::Cueball: Eww.

:Front door, Sewage: [red]
::Cueball: Oh ''no''.

:Septic tank, Sewage: [green]
::''Flush''

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring Knit Cap]]
[[Category:Confusion matrices]]
[[Category:Multiple Cueballs]]
[[Category:Charts]]

1031: s/keyboard/leopard/

2024-07-22T05:25:07Z

172.68.23.74: Undo revision 346849 by Megan (talk) Vandalism

{{comic
| number = 1031
| date = March 19, 2012
| title = s/keyboard/leopard/
| image = s keyboard leopard.png
| titletext = Problem Exists Between Leopard And Chair
}}
*Clicking on the image takes you to [http://wiki.xkcd.com/irc/Leopard this link] (now defunct, [https://web.archive.org/web/20190810230906/http://wiki.xkcd.com:80/irc/Leopard archive]).

==Explanation==
[[Randall|Randall's]] browser looks like {{w|Google Chrome}}, and he has installed at least four extensions on it, which explains the little symbols to the right of the address bar. Extensions are small programs that install into your {{w|Internet browser}} and change the Web pages as you view them. Some make pages easier to read, some remove ads (the third extension is [https://chrome.google.com/webstore/detail/adblock/gighmmpiobklfepjocnamgkkbiglidom AdBlock]) and so on.

For the joke in this comic, an extension accidentally replaces the word "{{w|Computer keyboard|keyboard}}" with "{{w|leopard}}" in a regex (or {{w|regular expression}}). In computing, a regular expression provides a concise and flexible means to "match" (specify and recognize) patterns in text, such as particular characters or words. The command to substitute/replace a string is "s", e.g. "s/old/new/g" replaces any occurrence of "old" with "new". The title therefore contains the command to change "keyboard" into "leopard".

It's not clear what the extension Randall installed was actually supposed to do, but most extensions that revolve around text replacement are humorous in nature (such as [https://chrome.google.com/webstore/detail/cloud-to-butt-plus/apmlngnhgbnjpajelfkmabhkfapgnoai?hl=en Cloud to Butt], which replaces all instances of "[[908: The Cloud|the cloud]]" with "my butt").

The title text references the common IT phrase "Problem Exists Between Keyboard And Chair" or {{w|PEBKAC}}, which means that the problem is caused by the user, not by any failure of the computer. However, due to the substitution, it is now "Problem Exists Between Leopard And Chair".

There has been several [[:Category:Substitutions|comics using substitutions]], both before and after this one.

===Sentences===



; Weird, my leopard just switched to Chinese.
: Sometimes, the keyboard settings may switch to Chinese due to a bug, or by unconsciously making the change. It is quite common for users with non-US keyboard layouts to find they have accidentally switched to the 'default', and conceivably this 'feature' could work the other way. Especially on systems with significant historic Chinese involvement in its [[2166: Stack|development]].
: Leopards are nor known to speak at all, let alone Chinese. Alternately, it refers to a change in diet of {{w|Man-eater|one form}} or {{w|Chinese restaurant|another}}.

; I work with one leopard on my desk and another in the leopard tray.
: Keyboards often take up desk space, and one solution is to have a [https://www.bpfonline.co.uk/search.asp?catid=2737 keyboard tray] that slides from under the desk, or out of the computer cabinet, when needed. This person apparently has two ''separate'' keyboards attached to their system(s), one taking up desk space and the other on the tray. This is probably more convenient than having two keyboards side by side (or on top of each other) on the desktop or two separate 'trays' (or two keyboards somehow jammed into the same tray), and often a person with such a requirement will have a computer for typical use (with the most accessible keyboard) and a second one only occasional use (with the second keyboard). They could also use a {{w|KVM switch}} for some of the peripherals, but it may not be quite as convenient or as easy to set up as to double up on the keyboards.
: Leopards are traditionally solitary animals outside of mating season, or when a mother is raising her cub(s), and so however practical it is to have two leopards in close proximity, it might be a somewhat necessary compromise to give them each their own area in a given workspace.

; Ever cleaned a leopard? They're filthy.
: Most people will use a keyboard for a long time, rarely replacing them unless they are actually broken, and possibly using old ones with new computers (if not integrated within their system, as with laptops). All this time, general detritus, skin, hair and even scraps of food will accumulate upon and beneath the keys unless cleaned thoroughly. Most people don't try to clean a keyboard ''until'' the accumulated grime starts to make typing a problem with less sensitive (or over sensitive!) keys. If you're finding it necessary to clean a keyboard at all, you will probably find quite a lot of filth to clean off/out.
: Leopards, like most cats, are generally adept at keeping themselves clean. However, as a wild animal they're perhaps considered less 'clean' than one would hope a household or workplace appliance might be, and this would depend upon one's attitude to their grooming by licking themselves all over.

; The iPhone virtual leopard is the fastest IMO.
: The response time of a keyboard is one of the factors that determine its quality, and the ability to rapidly enter characters (words, code, commands). A {{w|virtual keyboard}}, often implemented as a touch-screen 'app', has to integrate into the interface and the speaker here apparently rates the default iPhone type more than others of this kind.
: Real leopards are known to run fast. It is possible that a virtual leopard may be made to exemplify this speed. The makers of the iPhone have possibly made a virtual leopard that is faster than all real leopards, or at least they have made ''their'' virtual leopard faster than all other virtual leopards from all other vendors.

; I rarely email from my phone—I'm so slow when I'm not on a leopard.
: A disadvantage with virtual keyboards is often the lack of {{w|Haptic technology|haptic feedback}}, as well as the compressed and compromised layout required to fit the keys within interface. It is often much easier to use a proper full-sized keyboard, whether you hunt-and-peck or are an accomplished touch-typist, although this may depend a lot on practice.
: In the context of leopards, the individual concerned seems to appreciate the advantages of being on an actual leopard when emailing, as it makes them faster. This could mean faster because the leopard itself is wont to run around. Or perhaps it is because sitting on the back of a leopard (not particularly known for being a patient beast of burden) means you ''have'' to do what you are trying to do much faster, before the consequences being on a (possibly annoyed) leopard literally come back to bite you.

; My leopard died when I spilled tea on it :(
: Keyboards are not generally waterproof, and react badly to any liquid spill upon them. If you are lucky, you can quickly drain them, let them dry and they will not suffer too many ill effects in the long run. But, if the the less resiliant electronics get directly affected, it can mean having to replace the now unresponsive keyboard.
: Leopards are animals which eventually die. They are not known to be particularly susceptible to tea, as a substance, although the typically very hot water would not be comfortable and might contribute to the mortality of one in certain circumstances. Either way, it seems like an upsetting experience. ''My leopard' suggests (as with several of the above) that a leopard is being kept as a pet, working animal or perhaps a personal zoo inhabitant, and the loss certainly seems more than if a random leopard were accidentally splashed with a drink.

==Transcript==
:[There are two browser windows open on a computer screen.]
:[The first browser window, taking up most of the screen, but partly blocked by the other window at the bottom, has a Wikipedia article open. The title of the page can be seen on the active tab.]
:Computer leopard - Wikip...
:[Next to the address bar are four add-ons and the toolbar icon. One of the add-ons is a letter:]
:R
:[To the left on the page are standard menus, with lots of unreadable text, except these words:]
:Help
:Go Search
:[The page is not at the top of the article, so the text begins mid sentence, the very top of the letters just cut of in the first visible sentence.]
:which range from pocket-sized leopards to large desktop leopards, the leopard remains the most common user input device. In addition to text entry, specialized leopards are used for computer gaming.
:While many computer interfaces rely on mice or touchscreens, UNIX-style command-line interfaces require users to interact with a leopard.
:[Below is the contents list - the text in the brackets can barely be read. And only the very top of the 2.3 line can be seen, and is thus only a qualified guess at what it was supposed to say, although it fits with the real wiki article.]
:Contents [hide]
:1. History
:2. Leopard types
::2.1 Standard
::2.2 Laptop-sized
::2.3 Thumb-sized
:[To the right there is a picture of a keyboard. The picture text written below:]
:IBM Model M Leopard

:[The second browser window overlapping the first, at the level of the 2.3 menu point in the content menu, is a message board. The title of the page can be seen on the active tab:]
:Discuss - Leopard issu...
:[Next to the address bar are four add-ons and the toolbar icon. One of the add-ons is a letter:]
:R
:[In the window there is a list of topics next to icons of those starting the topic. The top post is just inside the frame, the icon cut of at the very top.]
:[Face of Cueball-like guy on white background:]
:Weird, my leopard just switched to Chinese.
::3 days ago
:[Super close-up of the head of a person with dark hair on black background:]
:I work with one leopard on my desk and another in the leopard tray.
::3 days ago
:[Full picture of a Cueball-like guy, with white background in the bottom half and dark in the upper half (which would conceal any hair on the persons head):]
:Ever cleaned a leopard? They're ''filthy''.
::2 days ago
:[Head of a cat on black background:]
:The iPhone virtual leopard is the fastest IMO.
::19 hours ago
:[Head of a girl with long blond hair on white background:]
:I rarely email from my phone—I'm so slow when I'm not on a leopard.
::11 hours ago
:[Head of Cueball-like guy. A line seems to be going our from his head, but it could just be one of the lines used to fill in the background:]
:My leopard died when I spilled tea on it :(
::2 hours ago

:[Below the main panel of the comic is the following caption:]
:The Internet got 100 times better when, thanks to an extension with a typo'd regex, my browser started replacing the word "keyboard" with "leopard".

==Trivia==
*When first posted, the title was written with lowercase characters, which Randall never uses. This was later changed to small caps.
*The title text could reference [[A-Minus-Minus]], the comic containing the phrase "Instead of office chair, package contained bobcat".


{{comic discussion}}

[[Category:Substitutions]]
[[Category:Comics featuring Cueball]]
[[Category:Multiple Cueballs]]
[[Category:Wikipedia]]
[[Category:Internet]]
[[Category:Language]]
[[Category:Animals]]
[[Category:Regex]]

1031: s/keyboard/leopard/

2024-07-21T13:48:21Z

172.68.23.74: Undo revision 346831 by ConscriptGlossary (talk) Vandalism

{{comic
| number = 1031
| date = March 19, 2012
| title = s/keyboard/leopard/
| image = s keyboard leopard.png
| titletext = Problem Exists Between Leopard And Chair
}}
*Clicking on the image takes you to [http://wiki.xkcd.com/irc/Leopard this link] (now defunct, [https://web.archive.org/web/20190810230906/http://wiki.xkcd.com:80/irc/Leopard archive]).

==Explanation==
[[Randall|Randall's]] browser looks like {{w|Google Chrome}}, and he has installed at least four extensions on it, which explains the little symbols to the right of the address bar. Extensions are small programs that install into your {{w|Internet browser}} and change the Web pages as you view them. Some make pages easier to read, some remove ads (the third extension is [https://chrome.google.com/webstore/detail/adblock/gighmmpiobklfepjocnamgkkbiglidom AdBlock]) and so on.

For the joke in this comic, an extension accidentally replaces the word "{{w|Computer keyboard|keyboard}}" with "{{w|leopard}}" in a regex (or {{w|regular expression}}). In computing, a regular expression provides a concise and flexible means to "match" (specify and recognize) patterns in text, such as particular characters or words. The command to substitute/replace a string is "s", e.g. "s/old/new/g" replaces any occurrence of "old" with "new". The title therefore contains the command to change "keyboard" into "leopard".

It's not clear what the extension Randall installed was actually supposed to do, but most extensions that revolve around text replacement are humorous in nature (such as [https://chrome.google.com/webstore/detail/cloud-to-butt-plus/apmlngnhgbnjpajelfkmabhkfapgnoai?hl=en Cloud to Butt], which replaces all instances of "[[908: The Cloud|the cloud]]" with "my butt").

The title text references the common IT phrase "Problem Exists Between Keyboard And Chair" or {{w|PEBKAC}}, which means that the problem is caused by the user, not by any failure of the computer. However, due to the substitution, it is now "Problem Exists Between Leopard And Chair".

There has been several [[:Category:Substitutions|comics using substitutions]], both before and after this one.

===Sentences===



; Weird, my leopard just switched to Chinese.
: Sometimes, the keyboard settings may switch to Chinese due to a bug, or by unconsciously making the change. It is quite common for users with non-US keyboard layouts to find they have accidentally switched to the 'default', and conceivably this 'feature' could work the other way. Especially on systems with significant historic Chinese involvement in its [[2166: Stack|development]].
: Leopards are nor known to speak at all, let alone Chinese. Alternately, it refers to a change in diet of {{w|Man-eater|one form}} or {{w|Chinese restaurant|another}}.

; I work with one leopard on my desk and another in the leopard tray.
: Keyboards often take up desk space, and one solution is to have a [https://www.bpfonline.co.uk/search.asp?catid=2737 keyboard tray] that slides from under the desk, or out of the computer cabinet, when needed. This person apparently has two ''separate'' keyboards attached to their system(s), one taking up desk space and the other on the tray. This is probably more convenient than having two keyboards side by side (or on top of each other) on the desktop or two separate 'trays' (or two keyboards somehow jammed into the same tray), and often a person with such a requirement will have a computer for typical use (with the most accessible keyboard) and a second one only occasional use (with the second keyboard). They could also use a {{w|KVM switch}} for some of the peripherals, but it may not be quite as convenient or as easy to set up as to double up on the keyboards.
: Leopards are traditionally solitary animals outside of mating season, or when a mother is raising her cub(s), and so however practical it is to have two leopards in close proximity, it might be a somewhat necessary compromise to give them each their own area in a given workspace.

; Ever cleaned a leopard? They're filthy.
: Most people will use a keyboard for a long time, rarely replacing them unless they are actually broken, and possibly using old ones with new computers (if not integrated within their system, as with laptops). All this time, general detritus, skin, hair and even scraps of food will accumulate upon and beneath the keys unless cleaned thoroughly. Most people don't try to clean a keyboard ''until'' the accumulated grime starts to make typing a problem with less sensitive (or over sensitive!) keys. If you're finding it necessary to clean a keyboard at all, you will probably find quite a lot of filth to clean off/out.
: Leopards, like most cats, are generally adept at keeping themselves clean. However, as a wild animal they're perhaps considered less 'clean' than one would hope a household or workplace appliance might be, and this would depend upon one's attitude to their grooming by licking themselves all over.

; The iPhone virtual leopard is the fastest IMO.
: The response time of a keyboard is one of the factors that determine its quality, and the ability to rapidly enter characters (words, code, commands). A {{w|virtual keyboard}}, often implemented as a touch-screen 'app', has to integrate into the interface and the speaker here apparently rates the the default iPhone type more than others of this kind.
: Real leopards are known to run fast. It is possible that a virtual leopard may be made to exemplify this speed. The makers of the iPhone have possibly made a virtual leopard that is faster than all real leopards, or at least they have made ''their'' virtual leopard faster than all other virtual leopards from all other vendors.

; I rarely email from my phone—I'm so slow when I'm not on a leopard.
: A disadvantage with virtual keyboards is often the lack of {{w|Haptic technology|haptic feedback}}, as well as the compressed and compromised layout required to fit the keys within interface. It is often much easier to use a proper full-sized keyboard, whether you hunt-and-peck or are an accomplished touch-typist, although this may depend a lot on practice.
: In the context of leopards, the individual concerned seems to appreciate the advantages of being on an actual leopard when emailing, as it makes them faster. This could mean faster because the leopard itself is wont to run around. Or perhaps it is because sitting on the back of a leopard (not particularly known for being a patient beast of burden) means you ''have'' to do what you are trying to do much faster, before the consequences being on a (possibly annoyed) leopard literally come back to bite you.

; My leopard died when I spilled tea on it :(
: Keyboards are not generally waterproof, and react badly to any liquid spill upon them. If you are lucky, you can quickly drain them, let them dry and they will not suffer too many ill effects in the long run. But, if the less resiliant electronics get directly affected, it can mean having to replace the now unresponsive keyboard.
: Leopards are animals which eventually die. They are not known to be particularly susceptible to tea, as a substance, although the typically very hot water would not be comfortable and might contribute to the mortality of one in certain circumstances. Either way, it seems like an upsetting experience. ''My leopard' suggests (as with several of the above) that a leopard is being kept as a pet, working animal or perhaps a personal zoo inhabitant, and the loss certainly seems more than if a random leopard were accidentally splashed with a drink.

==Transcript==
:[There are two browser windows open on a computer screen.]
:[The first browser window, taking up most of the screen, but partly blocked by the other window at the bottom, has a Wikipedia article open. The title of the page can be seen on the active tab.]
:Computer leopard - Wikip...
:[Next to the address bar are four add-ons and the toolbar icon. One of the add-ons is a letter:]
:R
:[To the left on the page are standard menus, with lots of unreadable text, except these words:]
:Help
:Go Search
:[The page is not at the top of the article, so the text begins mid sentence, the very top of the letters just cut of in the first visible sentence.]
:which range from pocket-sized leopards to large desktop leopards, the leopard remains the most common user input device. In addition to text entry, specialized leopards are used for computer gaming.
:While many computer interfaces rely on mice or touchscreens, UNIX-style command-line interfaces require users to interact with a leopard.
:[Below is the contents list - the text in the brackets can barely be read. And only the very top of the 2.3 line can be seen, and is thus only a qualified guess at what it was supposed to say, although it fits with the real wiki article.]
:Contents [hide]
:1. History
:2. Leopard types
::2.1 Standard
::2.2 Laptop-sized
::2.3 Thumb-sized
:[To the right there is a picture of a keyboard. The picture text written below:]
:IBM Model M Leopard

:[The second browser window overlapping the first, at the level of the 2.3 menu point in the content menu, is a message board. The title of the page can be seen on the active tab:]
:Discuss - Leopard issu...
:[Next to the address bar are four add-ons and the toolbar icon. One of the add-ons is a letter:]
:R
:[In the window there is a list of topics next to icons of those starting the topic. The top post is just inside the frame, the icon cut of at the very top.]
:[Face of Cueball-like guy on white background:]
:Weird, my leopard just switched to Chinese.
::3 days ago
:[Super close-up of the head of a person with dark hair on black background:]
:I work with one leopard on my desk and another in the leopard tray.
::3 days ago
:[Full picture of a Cueball-like guy, with white background in the bottom half and dark in the upper half (which would conceal any hair on the persons head):]
:Ever cleaned a leopard? They're ''filthy''.
::2 days ago
:[Head of a cat on black background:]
:The iPhone virtual leopard is the fastest IMO.
::19 hours ago
:[Head of a girl with long blond hair on white background:]
:I rarely email from my phone—I'm so slow when I'm not on a leopard.
::11 hours ago
:[Head of Cueball-like guy. A line seems to be going our from his head, but it could just be one of the lines used to fill in the background:]
:My leopard died when I spilled tea on it :(
::2 hours ago

:[Below the main panel of the comic is the following caption:]
:The Internet got 100 times better when, thanks to an extension with a typo'd regex, my browser started replacing the word "keyboard" with "leopard".

==Trivia==
*When first posted, the title was written with lowercase characters, which Randall never uses. This was later changed to small caps.
*The title text could reference [[A-Minus-Minus]], the comic containing the phrase "Instead of office chair, package contained bobcat".


{{comic discussion}}

[[Category:Substitutions]]
[[Category:Comics featuring Cueball]]
[[Category:Multiple Cueballs]]
[[Category:Wikipedia]]
[[Category:Internet]]
[[Category:Language]]
[[Category:Animals]]
[[Category:Regex]]

2296: Sourdough Starter

2024-07-21T13:47:41Z

172.68.23.74: Undo revision 312616 by ConscriptGlossary (talk) Vandalism

{{comic
| number = 2296
| date = April 20, 2020
| title = Sourdough Starter
| image = sourdough_starter.png
| titletext = Once the lockdown is over, let's all get together and swap starters!
}}

==Explanation==
This comic is another comic in a [[:Category:COVID-19|series of comics]] related to the {{w|COVID-19 pandemic}}.

Recently, because of the coronavirus, many people are forced to stay home in {{w|quarantine}} or under {{w|Stay-at-home order}}s. These conditions often lead to spare time that needs to be filled, and many people have turned to baking, which can usually be done entirely at home, is relatively time-consuming, and has the advantage of producing finished food, lessening the need to go out to buy food. This trend is common enough that baking supplies, including yeast, have seen a spike in demand, to the point where [https://www.foodandwine.com/news/yeast-supply-shortage-coronavirus many people have trouble finding it.]

As an alternative to yeast, consumers can grow their own sourdough starter, which is a symbiotic culture of yeast and bacteria naturally found in flour. Once the starter has matured, part of it can be used to make bread or other baked good rise, while the remainder can be mixed with more water and nutrients to allow the remaining yeast and bacteria to multiply once again. Because these populations need to be maintained, it's often been a practice to trade starters from house to house, with each home using starter when they need it, then setting up the remaining starter to breed more. This has historically been a social activity, allowing people who share an interest in baking to meet, share recipes, and spend time together.

The upshot of all of this is that the coronavirus pandemic has created conditions in which yeast (and symbiotic bacteria) are being bred in larger numbers, both by companies trying to fill demand, and by individuals trying to make their own. The joke is that this outcome is, in fact, the entire purpose of the coronavirus, which is in a {{w|symbiosis|symbiotic}} relationship with yeast. The entire global pandemic, by this logic, is directed to keep humans indoors and baking so that more yeast (and bacteria) is bred. The practice of swapping sourdough starters means that they're propagated more widely, increasing and distributing the yeast population (while potentially giving the virus more opportunity to spread, as people socialize).

As Randall points out, this cycle is extremely convoluted. However, it is not unknown for {{w|parasite}}s to drive the responses of other creatures in order to propagate themselves. For example, ''{{w|Toxoplasma gondii}}'' infects mice, but can only reproduce when it infects cats. The organism has therefore adapted to infect the nervous systems of mice, making them extremely reckless, increasing their odds of being caught and eaten by cats, allowing the the parasite to move to a new host. Some flatworm parasites have very complex life cycles that involve [http://olsonlab.com/resources/Publications/2003AdvParaCribb.PDF four different host animals].

Randall has previously speculated about unusual parasitic organisms in [[2246: Christmas Presents]], in which he "concluded" that Christmas presents are parasites of Christmas trees, possibly mediated by a fungus. And in [[1664: Mycology]] a fungus infects human brains making them wish to study (and thus grow more of) this fungus.

Viruses are not organisms (lacking some of the defining features of life), and it is debatable whether they would be considered parasites. Moreover, this theory is obviously implausible for a number of reasons. The most obvious being that natural responses, particularly of viruses and simple organisms, evolve over a long time scale. SARS-CoV-2, the virus responsible for the current pandemic, has very likely been infecting humans for less than one year, certainly not long enough to evolve such a complex set of behaviors. At the same time, a symbiotic relationship would require yeast to somehow contribute to the life cycle of the coronavirus in a meaningful way, which is unlikely when the yeast is being artificially bred in isolated containers. If however, as suggested by the title text, people getting together to swap yeast starters after the lockdown ends does cause the virus to begin spreading in humans again as a result of the social contact, then the yeast would be contributing to the life cycle of the coronavirus, in an equally convoluted way. The humor, therefore, is derived from the fact that this is a comical exaggeration, but based on cycles that actually do happen in nature.

==Transcript==
:[Cueball stands in front of a kitchen counter looking down at a glass jar he is holding in both hands. The jar's flat lid is lying on the table. There is another large jar farther back on the counter with a lid, with a small handle, on. In both jars there is a substance, which do stay in the same position in the jar even though Cueball tilts the jar he is holding.]
:Cueball: My sourdough starter is coming along nicely!

:[Caption below the panel]
:Theory: The coronavirus is a yeast symbiont with an '''''extremely''''' convoluted parasitic life cycle.

{{comic discussion}}

[[Category:COVID-19]]
[[Category:Comics featuring Cueball]]
[[Category:Food]]

Talk:2759: Easily Confused Acronyms

2024-07-11T10:41:40Z

172.68.23.74:

Comic 1937 also features misinterpretation of acronyms. [[User:Unreliable Connection|2659: Unreliable Connection]] ([[User talk:Unreliable Connection|talk]]) 03:59, 6 April 2023 (UTC)

.... i am gonna need a cetation on that bit about Archimedes. Does anyone have one? I don't doubt the veracity of the statement, but we have standards around here! [[Special:Contributions/162.158.154.143|162.158.154.143]] 06:14, 6 April 2023 (UTC)

: ''On the Equilibrium of Planes'' (Ancient Greek: Περὶ ἐπιπέδων ἱσορροπιῶν, romanized: perí epipédōn isorropiôn) is a treatise by Archimedes in two volumes. The first book contains a proof of the law of the lever ( https://en.m.wikipedia.org/wiki/On_the_Equilibrium_of_Planes ) [[Special:Contributions/172.71.246.60|172.71.246.60]] 07:05, 6 April 2023 (UTC)

The wikipedia page for LEVER is not working. I think it's case sensitive. [[User:N-eh|N-eh]] ([[User talk:N-eh|talk]]) 06:31, 6 April 2023 (UTC)

: fixed. [[Special:Contributions/162.158.86.200|162.158.86.200]] 07:15, 6 April 2023 (UTC)

Somebody posted a link to Comic 1937 by mistake and I made an edit to the page about San Diego and The Scrabble. Coincidentally, The new comic was also about acronyms. Incredible. [[User:Unreliable Connection|2659: Unreliable Connection]] ([[User talk:Unreliable Connection|talk]]) 09:10, 6 April 2023 (UTC)

Do we need a category about acronyms? There's [[1341: Types of Editors]], [[1460: SMFW]], and today's comic, and there may be more. [[User:Unreliable Connection|2659: Unreliable Connection]] ([[User talk:Unreliable Connection|talk]]) 09:22, 6 April 2023 (UTC)

xkcd = '''X'''ight '''K'''mplification by the '''C'''imulated '''D'''mission of radiation --[[Special:Contributions/162.158.154.140|162.158.154.140]] 09:29, 6 April 2023 (UTC)
:Except that ''R'' was not even used. So it'd be "adiation", for we replace "R" with nothing. [[Special:Contributions/172.68.51.12|172.68.51.12]] 09:02, 16 April 2023 (UTC)
LEVER is an acronym - Light Electric Vehicle Education and Research, [https://www.micromobilityresearch.com apparently].[[Special:Contributions/172.71.178.65|172.71.178.65]] 09:49, 6 April 2023 (UTC)

: Another use of LEVER as an acronym is [https://www.acronymattic.com/Laboratory-for-Evaluation-and-Validation-of-Epidemiologic-Research-(LEVER).html Laboratory for Evaluation and Validation of Epidemiologic Research] -- [[Special:Contributions/172.71.222.172|172.71.222.172]] 14:34, 6 April 2023 (UTC)

This raises the question why are there no SODARs, RANARs and LINARs? Or RASERs for that matter? --[[Special:Contributions/162.158.111.77|162.158.111.77]] 12:34, 6 April 2023 (UTC)

:RASERs only work in the online realm, where they're known as eRASERs.[[Special:Contributions/172.71.242.173|172.71.242.173]] 13:30, 6 April 2023 (UTC)

:In ''theory'', you could build a RASER (that is, a radio-wavelength LASER) via the 21cm (1420 MHz) hyperfine hydrogen transmission. That would require some fairly nontrivial engineering, and probably needs a very large superconducting magnet to establish a magnetic field gradient and allow for separation of atoms into parallel and anti-parallel magnetic moment populations. But, in principle, because of the astronomical importance of the 21cm transition, you could use this as an interstellar signalling device. Indeed, SETI considered (but rejected) the idea early on (although I'm not sure that building a 21cm RASER was feasible at the time). [[Special:Contributions/172.70.178.97|172.70.178.97]] 20:10, 6 April 2023 (UTC)

:RANAR exists pretty much only in controlled environment laboratory conditions. Radio doesn't reflect well enough off the ground for how noisy it tends to be in that spectrum. It's like trying to noticably brighten up a large grassy field in the middle of the day by shining a dim normal flashlight at it. [[Special:Contributions/172.71.146.119|172.71.146.119]] 06:15, 7 April 2023 (UTC)
::...whilst looking through a narrow-band anti-green filter and waving the torch around to try to invoke observable parallax in the remaining illumination/shadows. [[Special:Contributions/141.101.99.122|141.101.99.122]] 08:25, 8 April 2023 (UTC)

:Gotta say, I love this community for like this, the very reasonable conversation-rich question of why such logical things don't exist. :) [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 04:00, 8 April 2023 (UTC)

Is this comic inspired by a laser incident? [[User:Memo Spike Connector|2503: Memo Spike Connector]] ([[User talk:Memo Spike Connector|talk]]) 06:17, 14 April 2023 (UTC)

*It isn't ''just'' the first letter changed in the comic in the manner used in the article: if only the initials of ''stimulated'' were changed, it were "ntimulated", "dtimulated", "vtimulated" etc. So I believe that was just simplified to easen pronunciation.
*''RANAR'' would mean ''Ra''dio ''n''avigation ''a''nd ''r''anging (cf. above), ''LINAR'' would mean ''Li''ght ''n''avigation ''a''nd ''r''anging, ''SODAR'' would mean ''So''und ''d''etection ''a''nd ''r''anging, etc. (but I don't know how usable any of these are, or if they are used outside of controlled environments)
[[Special:Contributions/172.68.51.11|172.68.51.11]] 09:01, 16 April 2023 (UTC)

Sad to see that TASER isn't in the list, cause that really throws someone for a loop. Thomas A. Swift's Electric Rifle {{unsigned|Daemionfox|13:18, 19 April 2023}}

:And here I was, thinking that TASER stood for Torture Amplification by Stimulated Emission of Radiation. [[Special:Contributions/172.70.110.141|172.70.110.141]] 14:13, 4 May 2023 (UTC)

Does anyone here know about the Federal Oroadcasting Xompany? {{unsigned ip|172.69.22.144|08:06, 8 May 2023}}
: Japan also has a "National Hroadcasting Kssociation". {{unsigned ip|162.158.166.173|02:58, 18 May 2023}}

I kind of wish that SONAR was called SNAR. [[User:Psychoticpotato|Psychoticpotato]] ([[User talk:Psychoticpotato|talk]]) 13:35, 6 May 2024 (UTC)

I hate Cight Hmplification by the Itimulated Nmission of Aadiation!!!!!! [[Special:Contributions/172.71.150.145|172.71.150.145]] 12:41, 11 July 2024 (UTC)

Talk:1238: Enlightenment

2024-06-26T12:20:20Z

172.68.23.74:

I can't help but feel he toadaly missed out on "herd"!
Should this make me feel icky? Please help!
Monteletourneau [[User:Monteletourneau|Monteletourneau]] ([[User talk:Monteletourneau|talk]]) 05:13, 1 August 2013 (UTC)

Did anyone else notice the (most likely intentional) typos in that sentence they told her to type? "... and THEIR DEFINATELY good" (they're definitely) {{unsigned ip|‎115.30.33.36}}
:http://imgur.com/3Gpey 13:21, 6 April 2016 (UTC)~
:Title text: But the rules of writing are like magic spells. If you never acquire them, then not using them says nothing [[User:Donthaveusername|Donthaveusername]] ([[User talk:Donthaveusername|talk]]) 19:30, 9 October 2020 (UTC)
Didn't you notice "you're" and "idea's" as well. I would assume it is highly improbable that these were not intentional. [[Special:Contributions/74.125.16.2|74.125.16.2]] 04:51, 15 July 2013 (UTC)GusGold

Of course those were intentional. That was the joke. The exercise for INTERNET enlightenment and getting rid of insecurities is to make typos and grammatical errors freely. You may also notice them saying on the last panel "wasnt" and "its", instead of "wasn't" and "it's".
Megan just wasn't able to do this task of making intentional mistakes, which would result in people online thinking she's dumb (insecurities), so she broke the laptop and left. [[Special:Contributions/95.35.58.179|95.35.58.179]] 05:20, 15 July 2013 (UTC)
:Why do we think she broke the laptop and left? What's the circle on the ground for? (Looks like a StarTrek Transporter pad. And the pedestal just appeared as needed, must be virtual. Rather, I think she got UN-enlightened and zapped away into nothing-ness. [[Special:Contributions/12.234.99.131|12.234.99.131]] 16:41, 16 July 2013 (UTC) Zake

There's a huge difference between accepting others' misspellings and repeating them yourself...not commenting on someone typing "definately" is completely different than being told to spell it that way yourself. [[User:Wotpsycho|Wotpsycho]] ([[User talk:Wotpsycho|talk]])

I read you're explanation's and their definately helpful! --[[Special:Contributions/129.187.90.96|129.187.90.96]] 09:07, 15 July 2013 (UTC)

Having your ideas "approved" by someone who can't even spell might feel much worse than having them simply shot down.{{unsigned ip|89.31.118.161}}

Does anyone else think Ponytail appears to be levitating? --[[User:DanB|DanB]] ([[User talk:DanB|talk]]) 16:07, 15 July 2013 (UTC)

Someone deleted my edit, so I'm bringing it up here on the discussion page. The sentence contains more than just common misspellings; it also contains a common grammatical error. "I read your ideas and they're definitely good" is a run-on sentence. Joining two independent clauses requires BOTH a comma and a coordinating conjunction ("I read your ideas, and they're definitely good"). The sentence omits the comma. While certain style guides allow the comma to be left out when the two clauses are short enough, Megan's obstinate grammar-nazism is the entire point of the comic. It is unlikely she would let it slide. [[Special:Contributions/193.67.17.36|193.67.17.36]] 16:49, 15 July 2013 (UTC)
:"they're" refers to "ideas", the sentences are not independent.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 17:59, 15 July 2013 (UTC)
::That's not what an independent clause means. Can they be separated into two sentences? "I read your ideas. They're definitely good." Yes - it still makes sense as two sentences, thus the two clauses are independent. (An example of a dependent clause would be "I read your ideas while I was driving home." "While I was driving home" cannot stand on its own as a sentence, so it is not an independent clause.)[[Special:Contributions/193.67.17.36|193.67.17.36]] 18:17, 15 July 2013 (UTC)
:::I'm not a native English speaker, and I have learned only British English at school. But your statement makes sense. My first sentence is correct?--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 18:59, 15 July 2013 (UTC)
::::Yep, your first sentence is fine. I'm going to add the note about run-on sentences back into the Explanation; I hope nobody has any more objections. [[Special:Contributions/193.67.17.36|193.67.17.36]] 19:35, 15 July 2013 (UTC)
:::"...''whilst'' I was driving home"? ;) (And bear in mind as well that "while" can more commonly mean "until", instead of "during", in certain English-speaking dialects. Ok, I'm being picky, now.) [[Special:Contributions/178.98.50.23|178.98.50.23]] 05:40, 16 July 2013 (UTC)
::::Gr8 example of Internet forum tangental one-upmanship! [[Special:Contributions/12.234.99.131|12.234.99.131]] 16:41, 16 July 2013 (UTC) Zake
:This explanation makes a lot of sense. It helped me to stop being angry at the sentence they wanted her to type, and to pay attention to the bigger picture, especially when combined with the alt-text. Randall, I heard you're idea's and their definately good. (Also, I'm assuming that Internet Enlightenment allows me to be disgusted with myself for writing that, as long as I was willing to do so.) [[Special:Contributions/68.231.138.149|68.231.138.149]] 04:49, 16 July 2013 (UTC)
::It is perfectly correct to join two independent clauses with a coordinating conjunction and no comma. In fact it is often considered bad style (if not actually incorrect) to include both a comma and a conjunction when joining only two clauses.[[Special:Contributions/129.22.117.158|129.22.117.158]] 17:50, 16 July 2013 (UTC)
:::I'm not native English, as I explained before, but please give some more background information and not only a statement of your mind. And consider: This is American English, there are some odd commas. I'm still not sure what's correct.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 19:24, 16 July 2013 (UTC)
::::I'm not native either. What I've found on several sites [http://pages.uoregon.edu/munno/Writing/ClausesandCommas.html], [http://www.ego4u.com/en/cram-up/writing/comma?09] is ''two independent clauses connected by "and" or "but" are separated by a comma''—basically, because you would make a little pause at that point when used in speech. Contradicting this on {{w|simple:Run-on sentence}} I currently see ''"I looked over the hill and I saw the bear." is a complete sentence.'' (not two independent clauses—although grammatically possible), so simple-wikipedia could be wrong, or there is some tolerance, when two clauses are actually connected. In the end, I'd say this comma is not really worth that discussion, and I would suggest making some kind of neutral statement, e.g. ''and there might be a {{w|Run-on sentence|comma}} missing''. --[[User:Chtz|Chtz]] ([[User talk:Chtz|talk]]) 22:52, 16 July 2013 (UTC)
:::It is not perfectly correct to omit the comma. Chtz cited two sources above, here are a few more: [http://www.towson.edu/ows/conjunctions.htm], [http://grammar.ccc.commnet.edu/grammar/commas.htm], [http://www.getitwriteonline.com/archive/020204WhenCommaBfAnd.htm]. There is a little leeway for stylistic reasons, but as I mentioned above, the entire point of the comic is that Megan does not give leeway when it comes to grammar nazism. The corrected sentence in the explanation should be actually correct, not mostly-correct-but-given-a-little-stylistic-leeway.[[Special:Contributions/193.67.17.36|193.67.17.36]] 18:37, 17 July 2013 (UTC)
::::I (poster from 129.22.117.158 above) have looked into things more and stand corrected. I heard all you're ideas, and their definately good.[[Special:Contributions/209.152.196.210|209.152.196.210]] 13:04, 19 July 2013 (UTC)

I wonder if there's an additional level of meaning here. To me, the most striking thing about the sentence Megan won't type is not the bad spelling, but the fact that it involves agreeing with someone. On the Internet, people are always arguing with other (as in, for example, http://xkcd.com/386/). Maybe what Megan had to do to become "enlightened" was not just to ignore the rules of spelling, but actually to agree with someone for a change?{{unsigned ip|134.226.254.178}}
:Well, that's why I wrote the third paragraph, about how important agreement can be. Do you have any suggestions as to how we could emphasize this point more? [[User:PinkAmpersand|PinkAmpersand]] ([[User talk:PinkAmpersand|talk]]) 22:03, 16 July 2013 (UTC)

Be associated with bad grammar, Yoda would not. [[User:Alcatraz ii|Alcatraz ii]] ([[User talk:Alcatraz ii|talk]]) 08:22, 17 July 2013 (UTC)
;Incomplete or not?
I did add the tag again because there are too many edits at this page and also the discussion is still not clear. I would like to see the grammar issue solved by more explain, even when it's not easy.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 22:16, 16 July 2013 (UTC)

I'm not sure if it's worth mentioning any more comparisons, but I'd put it don't here at least: It reminds me of Schindler's List when Schindler tries to convince Amon Goeth, a commander of a Nazi concentration camp, that true power is when you have the power (and justification) to kill someone, but you spare them. This is an attempt to change the behaviour of Amon, who has a habit of killing random camp internees (and _believes_ he has the right to do so).{{unsigned ip|Svend}}
:Hey, you compared something to the Nazis! I invoke Godwin's Law! http://xkcd.com/261/{{unsigned ip|134.226.254.178}}

Note I have removed a misguided rant from Dgbrt regarding Svend's thoughtful post. [[Special:Contributions/199.27.128.88|199.27.128.88]] 09:06, 27 December 2013 (UTC)

This xkcd is all about how hard it is not to be a grammar nazi. --[[Special:Contributions/84.60.134.161|84.60.134.161]] 02:12, 24 July 2013 (UTC)

:Ah! So sweet and succinct! That line should be in the explanation. Perhaps with the words "for some people" added, but yeah. [[Special:Contributions/108.162.225.134|108.162.225.134]] 05:29, 25 April 2015 (UTC)

I strongly disagree with Randall and this comic, that making grammar errors and appearing uneducated is OK, and anyone who doesn't want to make themselves sound stupid is insecure (no, I want to communicate clearly and present ideas using proper and consistent language conventions). [[User:Jimbo1qaz|Jimbo1qaz]] ([[User talk:Jimbo1qaz|talk]]) 08:50, 28 February 2018 (UTC)

I had a completely different reaction to this comic. I interpreted the circle as a trap door. I interpreted it as Megan failed to notice the typos in the sentence, and typed it out exactly as shown. The test was to see if she would type it correctly. She failed the test and fell through the trap door, knocking over the laptop on the way down.{{unsigned ip|162.158.75.160|16:06, 9 September 2020}}

If they spoke in person (or ''via'' anything involving voice) about these ideas, they ''could'' have heard the other person's ideas. [[Special:Contributions/172.70.38.47|172.70.38.47]] 05:27, 9 June 2024 (UTC)
== OVerComplete? ==

Not 2 happy with There is also a double meaning - not writing anything at all is in fact "saying nothing". 
While "good enough" Zen, this reading is a bit beyond the obvious' of the rest. 
BTW, I would hold that, to subvert the comic, we need to keep the discussion going and correct each other in a most pedantic but loving way. Moreso, I intend to use this comic widely as I go around correcting the internet. [[User:Yamaplos|Yamaplos]] ([[User talk:Yamaplos|talk]]) 14:19, 1 July 2020 (UTC)

In order to pass the Turing test[citation needed], even some robots began to intentionally misspell words. [[User:ConscriptGlossary|ConscriptGlossary]] ([[User talk:ConscriptGlossary|talk]]) 12:11, 26 June 2024 (UTC)

:Hey, what are you doing? Splitting infinitives? Don't do that again. The "to" is like the head. The infinitives will get angry and split you in the neck. [[Special:Contributions/172.68.23.74|172.68.23.74]] 12:20, 26 June 2024 (UTC)

Talk:2941: Cell Organelles

2024-06-05T13:20:32Z

172.68.23.74:

I'm a little disappointed there isn't a continuous endoplasmic reticulum with a zigzag in it.
Rogue mathematician away [[Special:Contributions/172.71.154.77|172.71.154.77]] 19:20, 3 June 2024 (UTC)

Sorry about the edit conflicts, attempting to fix.... [[Special:Contributions/108.162.245.237|108.162.245.237]] 20:12, 3 June 2024 (UTC)

Re [https://www.explainxkcd.com/wiki/index.php?title=2941:_Cell_Organelles&diff=343629&oldid=343628] is LLM use forbidden? I recall we have several ChatGPT-authored explanations, and had an ongoing discussion back when it was new. In any case, I've proofread and vouch for it, so I'm replacing the text. I encourage anyone who's bothered by it to paraphrase instead of delete. [[Special:Contributions/108.162.245.237|108.162.245.237]] 21:22, 3 June 2024 (UTC)

:If you've got the time to check AI-generated content properly and agree that it's what ''you'' would have written, you've got time to write it from scratch exactly how you'd have written it. And you get dangerously close to just putting in AI-content without checking at all, which right now is remains foolhardy.
:But, most of all, anything anyone submits can be changed by anyone else, and I don't know who picked up on it being AI and dealt with it the way they did, but only consensus can truly resolve where any attempt to impose an edit leads. [[Special:Contributions/162.158.74.119|162.158.74.119]] 22:36, 3 June 2024 (UTC)

::I almost completely agree with you for Wikipedia (I'd just change 'would' to 'could') and similar wikis, but it's undeniable that ExplainXkcd is different in some very substantial and obvious ways, many of which bear on whether to utilize AI. In particular, I would accept pretty much anything that helps explain the comic whether authored by human, machine, animal, or alien, but not hesitate for a second to, as the text below the Summary text input box says, edit it "mercilessly" whether I thought it was LLM-generated or not. But I wouldn't delete an even barely serviceable explanation ''just'' because I thought it came from an LLM, even if it was objectively low quality. I would try to improve it, which almost never means starting over from scratch. I'm not sure I believe the same is true for humans, who often insert, e.g., vandalism, trolling, or extremely undue and/or fringe topic passages. If an LLM is doing that, there's probably a human behind it. [[Special:Contributions/108.162.245.17|108.162.245.17]] 00:21, 4 June 2024 (UTC)

:Both the paragraphs and the table have been edited far enough from what ChatGPT pretty obviously came up with (almost all of which I would say merit inclusion unaltered, [https://www.explainxkcd.com/wiki/index.php?title=2941:_Cell_Organelles&diff=343604&oldid=343601 looking at the initial edits; although there is evidence that the LLM output was copyedited and wikilinked in a way that it would probably not do,] i.e., we use the {{tl|w}} template here which is not at all a Mediawiki standard, the Wikimedia wikis having a different form <nowiki>[[w:...]]</nowiki>) so that whatever deleterious LLM contamination they had has surely been beat out of them at this stage. Perhaps the GenAI deletionist is trying to encourage others to not fall prey to reliance on LLMs? A worthy goal, but I agree paraphrasing is far superior. [[Special:Contributions/172.69.34.180|172.69.34.180]] 01:57, 4 June 2024 (UTC)

Re: the chloroplasts explanation: how do we know that this is an animal cell? (Would be good to say why...) -- [[User:Dtgriscom|Dtgriscom]] ([[User talk:Dtgriscom|talk]]) 22:18, 3 June 2024 (UTC)
:The cell has a membrane instead of a wall. [[Special:Contributions/162.158.90.199|162.158.90.199]] 22:24, 3 June 2024 (UTC)
::No, that’s human skin. [[User:Usb-rave|Usb-rave]] ([[User talk:Usb-rave|talk]]) 00:48, 4 June 2024 (UTC)
:: There are lots of organisms out there that have plastids (chloroplasts) and do not have cell walls ... that, in fact, do not fit the common conception of either 'plant' or 'animal'. Euglena might still be the most famous example - Euglena is more closely related to the protozoa that cause trypanosomiasis than to either plants or animals - but there are many others, and it's a deep rabbit hole. [[Special:Contributions/162.158.41.117|162.158.41.117]] 18:52, 4 June 2024 (UTC)
:: And speaking of "lucky to have them", did you know that plastids are [https://en.wikipedia.org/wiki/Kleptoplasty worth stealing]? [[Special:Contributions/172.68.23.200|172.68.23.200]] 21:14, 4 June 2024 (UTC)

:::Yeah, the rule of thumb is of course a generalization worthy of chemistry "rules" -- the {{w|bone cell}} being perhaps the most obvious uncategorizable corner case of several. [[Special:Contributions/172.71.150.236|172.71.150.236]] 02:12, 4 June 2024 (UTC)

Why does Golgi look like an alien, he's so little and cute. Wtf. [[User:Psychoticpotato|Psychoticpotato]] ([[User talk:Psychoticpotato|talk]]) 23:11, 3 June 2024 (UTC)

:You know what I would like to see from AI? A tiny white Grey Golgi alien working in the cytoplasm to build his apparatus. Please see below. [[Special:Contributions/172.71.147.106|172.71.147.106]] 03:50, 4 June 2024 (UTC)

Should 2732: Bursa of Fabricius be referenced? It feels like the Golgi Apparatus is making a similar joke, if somewhat inverted. [[User:Dkfenger|Dkfenger]] ([[User talk:Dkfenger|talk]]) 01:19, 4 June 2024 (UTC)

To me, 'Drain plug' is an engine oil-drain plug. Yes it is a bolt, rarely used in biological systems. But a cell and an engine are normally full of fluid, while plumbing sinks are normally empty. --[[User:PRR|PRR]] ([[User talk:PRR|talk]]) 02:10, 4 June 2024 (UTC)
:To me it's about as often something you would find in a kitchen or bathroom sink, especially if the plumbing was from the 1970s or earlier. Honestly I'm too young to know when sink plugs fell out of favor to levers. In any case, an actual hole in the cell membrane is almost always a potentially mortal wound, and few cells have any means of repairing all but the smallest tears. [[Special:Contributions/172.70.207.197|172.70.207.197]] 02:47, 4 June 2024 (UTC)

Hello there! 👋 I think you guys mixed up midichlorian and mitochondria explanations. 👋 You surely will want to fix that. 👋 Also, you want to make me a sandwich. [[Special:Contributions/172.70.85.177|172.70.85.177]] 05:13, 4 June 2024 (UTC)
:LGTM. [[Special:Contributions/172.71.146.218|172.71.146.218]] 09:29, 4 June 2024 (UTC)

I'm a little bit disappointed that there's no Sulawesi hidden in there. This is the sort of comci you'd expect it in. [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 06:48, 4 June 2024 (UTC)
: I'm disappointed that, alongside the drain plug, there isn't a pain drug.[[Special:Contributions/172.69.195.183|172.69.195.183]] 12:52, 4 June 2024 (UTC)
:: It would have had to have been a generic. [[Special:Contributions/172.71.147.141|172.71.147.141]] 03:21, 5 June 2024 (UTC)
::: Generic, or genetic?[[Special:Contributions/172.70.90.123|172.70.90.123]] 09:40, 5 June 2024 (UTC)
:::: Generic, as in "not fancy". [[Special:Contributions/172.68.23.74|172.68.23.74]] 13:20, 5 June 2024 (UTC)

I dislike that this table is in alphabetical order instead of the top-down order they were meant to be read.[[Special:Contributions/172.70.231.39|172.70.231.39]] 10:08, 4 June 2024 (UTC)
:"Fixed." Click the column heading to return to alphabetical order. [[Special:Contributions/162.158.186.196|162.158.186.196]] 17:19, 4 June 2024 (UTC)

I'm going to fail my Biology exam tomorrow because of this :( ([[User talk:SectorCorruptor|talk]]) 11:52, 4 June 2024 (UTC)

Just wanted to leave a message to the person who added the 'citation needed' footnote to the remark that Golgi was not and is not an alien in our cells: Your, dear person, made my day. Thanks a ton! [[Special:Contributions/172.70.250.43|172.70.250.43]] 08:31, 5 June 2024 (UTC) c-schroed

=== Golgi by AI art contest ===

Survey questions: (1) Which of these do you like the best? https://ibb.co/album/68tCSn Can you do better?

(2) Does anyone know how to make AI animations like those? [[Special:Contributions/172.71.142.181|172.71.142.181]] 03:49, 4 June 2024 (UTC)

== Nucleolus ==

Wouldn't "Nucleololus" be a better continuation to "Nucleus" and "Nucleolus", with each term getting one more "ol" between "e" and the second "u"? [[Special:Contributions/172.71.222.50|172.71.222.50]] 08:04, 4 June 2024 (UTC)

2940: Modes of Transportation

2024-06-05T07:58:10Z

172.68.23.74: /* 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 by how convenient and dangerous they are. At the top-left (high in convenience and low in danger) are airliners and trains, as these are both fast-moving vehicles on which many millions of dollars have been spent to make them safer. In the top-right, motorcycles are at the same convenience level, but are rated much more dangerous, since they are easy to lose control of at high speeds, and careless drivers (of cars) can easily hit a motorcycle and cause extreme harm. Things like unicycles (bottom-left) are considered much lower on the convenience scale, being not very fast or easy ways to travel, but relatively safe, while towards the centre, skis are apparently moderately convenient and moderately dangerous, since they are relatively easy to fall on if going fast downhill. Way out on their own in the bottom-right, hot air balloons appear to be unique in being rated least on convenience and highest on danger. Presumably, modes of transportation similar to hot air balloons (like zeppelins and blimps) are left off the chart to increase the gap for comedic effect.

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. This could be because, unusually, on the y axis of the chart higher is better, whereas on the x axis lower is better. If these were treated the wrong way around, it would result in the air balloon appearing to be the best result. More typically, you might plot convenience vs ''safety'', so that a higher value on either axis would represent a better result. However, both measures are still likely to need to take underlying data (for safety, incident counts, etc.; for convenience, travel time, etc.) and invert them, leading to potential for errors.

The modes are grouped into several zones by darkened backgrounds -- the easiest or most effective that are also the safest ones (trains, cars, walking, biking, boats, etc.) are in the '''Zone of Practicality''' at the upper left. The ones that are mixed, ranging from very useful for travel but dangerous (motorcycles and helicopters) in the upper-right, through moderately dangerous and moderately unpractical (go karts, skateboards, rollerblades, skis, light aircraft) in the middle, to quite safe but totally unpractical for travel (bumper cars, unicycles, sleds) in the lower-left are in the '''Zone of Specialty or Recreational Vehicles'''. At the extreme of dangerous and very unpractical (lower-right) is a zone labeled simply '''?????''' containing one only mode: Hot Air Balloons.

In order to compare the relative danger from each mode of transport, one can look at statistics of fatalities and injuries sustained during each activity. Traditionally this can be reported in fatalities/{{w|Killed_or_Seriously_Injured|KSI}} per mile driven or passenger mile (or other unit of distance), to account for the fact that some modes are used much more than others and make valid comparisons. They may also be reported per capita (but this ignores the relative usage of different modes), or per journey (but this doesn't take into account the fact that different modes typically have different journey lengths and times). All of these are somewhat flawed, since they are really measuring the danger ''to'' users of that mode of transport, both from their own conveyance, and from other sources such as other road users. Since ballooning is not a very common mode of transport, hot air balloon incidents are [https://pubmed.ncbi.nlm.nih.gov/9533500/ correspondingly uncommon], and flights are not routinely monitored or registered, it is difficult to draw strong conclusions from the data for hot air balloons.

The title text makes a joke that if a hot air balloon enthusiast disagrees with the ranking and is angered by it, they may wish to remonstrate or retaliate, but will have a difficult time getting to Randall's house with their preferred mode of transportation, because they are limited to travelling in the direction of the wind. If they chose an alternative form of transport, they would be making his point for him. 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.

This is the second comic in a row to feature an algorithm.

{| class="wikitable sortable"
|-
! Transportation !! Description !! Convenience !! Danger !! Zone
|-
|{{w|Train}}s
|Mass transit on rails, typically between urban centers.
|data-sort-value=""|Convenient and comfortable, provided proper funding/maintenance and filled timetables. Allows relatively cheap travel for many people at once.
|data-sort-value=""|Exceedingly safe, due to dedicated tracks along a controlled environment. In places with strong safety regulations and well-maintained infrastructure, fatalities are generally limited to individuals wandering onto the off-limit tracks.
|Practicality
|-
|{{w|Airliner}}s
|Mass transit by aircraft
|data-sort-value=""| Extremely fast travel between population centers for larger groups of people. Less comfortable and more expensive than trains.
|data-sort-value=""| Extremely safe due to strong regulation and relatively little traffic interactions. However, the few catastrophies that do happen have high death counts.
|Practicality
|-
|{{w|Car}}s
|Motorised road vehicle Most common method of long distance travel, used by many individuals to reach specific destinations
|data-sort-value=""| Owners of a car can usually go easily to any road-accessible location within a 200 mile/300 km radius. Requires constant focus, but can transport a few passengers or some cargo. Parking, maintenance, and infrastructure requirements are often ignored when judging car convenience.
|data-sort-value=""| While collisions can be extremely serious, due to the high speeds and large mass of most cars, decades of advancement have resulted in most cars being designed around safety considerations, which protect the passengers from serious injuries in most accidents. While road fatalities remain high in many countries, the per-mile rate rate of injury and death is relatively low, compared to most means of transit in this chart.
|Practicality
|-
|Scooters
|Either: 
*{{w|Kick scooter}} - Less convenient than the placing would suggest.
*{{w|Scooter (motorcycle)|Low powered motorbike/moped}} - More dangerous than the placing would suggest.
*{{w|Motorized scooter|Engine-powered scooter}} - A middle-ground.
|data-sort-value=""| Kick scooter-style vehicles are probably less convenient than bicycles as they do not provide seating, and are less efficient at converting energy into motion. A low-powered motorbike is about as convenient as a bicycle, requiring refueling in lieu of pedalling, and going much faster.
|data-sort-value=""| Kick scooters are much slower – and therefore safer – than bicycles. Some motorized scooters can reach speeds comparable to car travel, but they are usually limited to speeds around average cycling speeds. Falling from one might be slightly safer than from a bicycle. Low-powered motorbikes often go much faster than bicycles, and would therefore be much more dangerous. All leave the rider vulnerable to danger from motorised traffic sharing the same space.
|Practicality
|-
|{{w|Bicycle}}s
|Human-powered (or {{w|Electric bicycle|mostly so}}) two-wheeled road vehicle
|data-sort-value=""| Assuming proper road or trail connections, bicycles are highly flexible for traveling to any location within a ~10 km radius, or further. They are a very efficient use of human power for producing motion.
|data-sort-value=""| Bicycles mostly move slow enough for falls or collisions to have little impact, though they are vulnerable to motorized traffic where it shares the road, and are often perceived to be much more subject to danger than they really are.
|Practicality
|-
|{{w|Boat}}s
|Watercraft of various types
|data-sort-value=""| Specialized for water traffic, which is a very common form of transportation. Quite comfortable (unless you suffer from seasickness), but usually very slow.
|data-sort-value=""| Sinking, capsizing, or falling overboard, whether by collision or misuse, can be lethal, especially on the sea. However, collisions are very rare.
|Practicality
|-
|{{w|Walking}}
|Personal bipedal ambulation 
|data-sort-value=""| Can travel between any two connected points regardless of infrastructure, but most people only find it comfortable for a few kilometers. Very slow compared to even bicycles, but the energy intensity is good for exercise.
|data-sort-value=""| Due to the slow speed of walking, it's extremely rare for the activity to cause serious injuries or death. The primary risk from walking itself is falling, particularly down stairs or from some other height. Walking may expose a person to outside risks (eg: vehicle collisions, weather exposure, wildlife encounters, crime), but the act of walking itself is exceptionally safe.
|Practicality
|-
|{{w|Motorcycle}}s
|...
|data-sort-value=""| As practical as cars to move between locations, and sometimes quicker, due to the ability to filter in traffic, but generally less comfortable, especially in rough weather.
|data-sort-value=""| Motorcycles generally move as fast as cars, introducing all of the dangers that come with speed. Having two wheels, rather than four, there's a significantly higher risk of losing control and falling. Being smaller than a car, there's more danger of not being seen in a potential collision. Most importantly, the driver is fully exposed, lacking both the enclosure of a car or truck and all of the safety features that come with it, and has no protection other than any personal gear they're wearing. In consequence, motorcycles have a per-mile fatality rate 25 times higher than cars.
|Speciality/Recreational
|-
|{{w|Helicopter}}s
| Rotorcraft in which lift and thrust are supplied by horizontally spinning rotors.
|data-sort-value=""| Effective to move between any two points as long as there are landing pads of reasonable size. Can be used to hover relatively still in the air. Speed for utility helicopters is comparable to trains. Very loud, and very difficult to learn to fly.
|data-sort-value=""| As per {{w|Harry Reasoner}}: "An airplane by its nature wants to fly, and if not interfered with too strongly by unusual events or by a deliberately incompetent pilot, it will fly. A helicopter does not want to fly. It is maintained in the air by a variety of forces and controls working in opposition to each other, and if there is any disturbance in this delicate balance the helicopter stops flying; immediately and disastrously. There is no such thing as a gliding helicopter."
|Speciality/Recreational
|-
|{{w|Light aircraft}}
|In the United States, the general 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=""|Convenience greatly depends on style of aircraft, proximity of airfields to intended destination as well as "first and final mile" transportation, etc. In many areas the need for a trained pilot as well as costs and time spent on the ground at an airfield ("taxi time") and the variability of weather conditions make surface transportation (automobiles, trains, buses) and commercial aircraft more practical. However, in areas such as the Alaskan interior and north slope, light airplane travel becomes critically important for living and working in remote areas.
|data-sort-value=""|
|Speciality/Recreational
|-
|{{w|Go-kart}}s
|...
|data-sort-value=""| A lack of proper suspension makes for a bumpy ride, poor clearance would leave them at risk of grounding on more uneven terrain, and the maximum speed is quite low.
|data-sort-value=""| Crashing is much more likely to cause spinal damage than bicycles, but the relatively low speed would make them much safer than other motorized vehicle options.
|Speciality/Recreational
|-
|{{w|Skateboard}}s
| A board on four wheels
|data-sort-value=""| Much slower and less energy-efficient than bicycles.
|data-sort-value=""| As long as you're not doing mad tricks in a quarterpipe, using a skateboard for transportation carries little risk, other than being struck by other users of the same space. Safety gear is common.
|Speciality/Recreational
|-
|{{w|Inline skates|Rollerblades}}
| Shoes with a single line of wheels at the bottom
|data-sort-value=""| Much slower and less energy-efficient than bicycles.
|data-sort-value=""| As long as you're not doing mad tricks in a quarterpipe, using rollerblades for transportation carries little risk, other than being struck by other users of the same space. Safety gear is common.
|Speciality/Recreational
|-
|{{w|Ski}}s
| Narrow strips of material to stand on while sliding across a low-friction surface
|data-sort-value=""| A fine way to move downhill relatively fast, but maintenance of the slope is required. Also a fairly quick way to travel on the flat when there is snow cover that would make other modes of transport challenging. Less useful in less conducive conditions.
|data-sort-value=""|Downhill skiers can reach high speeds at which collisions could cause significant injury to the skier's lightly protected body. It can be hard to control your speed at lower skill levels, but as long as low speeds are maintained (as it might when used as a transportation option), skiing is not that dangerous.
|Speciality/Recreational
|-
|{{w|Unicycle}}s
| One-wheeled human-powered vehicle
|data-sort-value=""|While it can be a [https://www.somersetcountygazette.co.uk/news/24351890.wellington-teen-circumnavigates-globe-unicycle/ practical form of transport] for skilled riders, unicycles are very low on the "convenience" scale. Having only a single wheel makes balance much more difficult, especially over longer distances, and the lack of gearing makes pedalling less efficient and more taxing, particularly as road conditions change.
|data-sort-value=""| While riders may be more likely to fall off unicycles than bicycles (particularly when new to them), the low speed and minimal height mean that falls are highly unlikely to cause serious injuries. Despite their difficulty, it's almost unheard of for people to die in unicycle accidents.
|Speciality/Recreational
|-
|{{w|Sled}}s
| A construction that can slide over snow, ice, or sand
|data-sort-value=""| Useful in limited conditions in which other forms of transport might struggle to cope with.
|data-sort-value=""| It is hard to properly control your speed downhill, but extremely safe on level terrain or slight slopes.
|Speciality/Recreational
|-
|{{w|Bumper Cars}}
| Small electric karts with rubber bumpers
|data-sort-value=""| Only really convenient for making ''very'' short journeys. Typically require an electronic mesh in the ceiling to move at all.
|data-sort-value=""| Because these vehicles travel only at very slow speeds, are confined to a small and controlled area, and are protected by large, shock-absorbing bumpers, the risk of injury is almost non-existent. This to the point where small children not only use them with minimal supervision, but are encouraged to collide with one another.
|Speciality/Recreational
|-
|{{w|Hot Air Balloon}}s
| A basket tied to a huge bag of heated air
|data-sort-value=""| Provide limited control and low speeds. They were the primary form of air-travel available in the 19th-century, but were overtaken by powered air-travel.
|data-sort-value=""| A malfunction in the balloon can result in a very rapid descent, from great height. A poorly executed descent could result in a mid-air collision (e.g. with trees, powerlines, etc.) with potential for a nasty fall. The air that provides the lift is heated by a flame, which may be open, and the envelope catching fire would very likely cause an uncontrolled descent with high likelihood of death. Further known dangers are malfunctions of the propane tanks fueling the burner causing an explosion and falling down the edge of the basket due to improper or no tethering. While accidents aren't especially common, this is because hot air balloons are not common forms of transit. The number of injuries per passenger-mile is at least as high as any other form of transit in this chart.
|?????
|}

==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.]
:[In gray text, "Zone of practicality" points to a large irregular area fitting in to the top left corner of the chart with a gray background. The following modes are shown in this area, 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]
:[In gray text, "Zone of specialty and recreational vehicles" points to a large irregular swathe from the top right to the bottom left with a gray background. The following modes are shown in this area, with 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]
:[In gray text, "?????" points to a small blob in the bottom right corner with a gray background, notably distant from the nearest other group. A single mode is included in this area:]
::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]]

2941: Cell Organelles

2024-06-04T08:59:58Z

172.68.23.74: /* Transcript */ clearer

{{comic
| number = 2941
| date = June 3, 2024
| title = Cell Organelles
| image = cell_organelles_2x.png
| imagesize = 563x451px
| noexpand = true
| titletext = It's believed that Golgi was originally an independent organism who was eventually absorbed into our cells, where he began work on his Apparatus.
}}

==Explanation==
{{incomplete|Created by a GOLGI ENDOPLASMIC RETICULUM. Do NOT delete this tag too soon.}}

This comic depicts a {{w|Cell (biology)|biological cell}} diagram with a mix of real and fictional {{w|organelle}}s, blending accurate {{w|Cell biology|cell biology}} terms with misplaced or absurd labels. While it includes actual cell components like the nucleus, mitochondria, and Golgi apparatus, it also includes unrelated concepts from various fields such as geology, engineering, software, and pop culture. Labels like "evil endoplasmic reticulum" and "sticky endoplasmic reticulum" make fun of scientific terms. The comic plays on the complexity and diversity of cell structures by mixing in unrelated and humorous terms, highlighting the often confusing and intricate nature of scientific diagrams with clever wordplay and cross-disciplinary jokes.

The title text adds a humorous fictional backstory to the {{w|Golgi apparatus}}, an essential cell organelle involved in processing and packaging proteins. It playfully suggests that {{w|Camillo Golgi}}, the scientist who discovered the Golgi apparatus, was originally an independent organism. This organism was supposedly absorbed into our cells, where it then started working on what is now known as the Golgi apparatus. The joke is a satirical take on {{w|Symbiogenesis|endosymbiotic theory}}, which posits that certain organelles within {{w|Eukaryote|eukaryotic}} cells, like {{w|mitochondria}} and {{w|chloroplasts}}, originated from independent symbiotic {{w|Prokaryote|prokaryotic organisms}} that were absorbed by a host {{w|germ cell}}. Golgi appears to be depicted in the comic as a tiny alien being.

{| class="wikitable"
|-
! Label
! Meaning
! Real?
! Cell organelle?
! Explanation
|-
| {{w|Carbonation}}
| {{w|Carbon dioxide}} dissolved in a liquid.
| Yes
| No
| Carbonation causes soda pop and similar liquids to bubble, fizz, foam, and {{w|effervesce}}.
|-
| {{w|Cellophane}}
| A thin, transparent sheet made of regenerated {{w|cellulose}}.
| Yes
| No
| A type of packaging material. Cellulose is only found in plant cells, while the cell shown appears to be an animal cell because it lacks a {{w|cell wall}}.
|-
| {{w|Chloroplast}}s if you're lucky
| Organelles in plant cells responsible for photosynthesis.
| Yes
| Yes
| Actual cell organelles, only found in plant cells. The phrase "if you're lucky" could suggest that they might be less dangerous than other misplaced plant organelles, or that the animal cell is lucky to be able to photosynthesize.
|-
| Drain plug
| A stopper for a drain.
| Yes
| Conceivably
| A plumbing term, which could refer to a {{w|porosome}}. Even small, temporary damage to the integrity of the {{w|cell membrane}} puts the cell at immediate and great risk of death.
|-
| Evil endoplasmic reticulum
| Not a real term.
| No
| No
| A humorous twist on the different types of actual {{w|endoplasmic reticulum|endoplasmic reticula}}, implying a malevolent version.
|-
| Golgi
| {{w|Camillo Golgi}} (1843–1926) was an Italian biologist and {{w|pathologist}} who discovered the Golgi apparatus; known also for his works on the central nervous system.
| Yes
| No
| The real Golgi was not and is not a tiny alien being who merged with our cells, as the comic and title text imply.{{cn}}
|-
| {{w|Golgi apparatus}}
| A complex of {{w|vesicles}} and folded membranes involved in secretion and intracellular transport.
| Yes
| Yes
| Actual cell organelle, which takes {{w|polypeptide}} chains from the rough endoplasmic reticulum (carried via transport vesicle) and processes them into their ultimate protein structure before sending them (via vesicles) to their destination (such as an organelle or outside of the cell).
|-
| Human skin
| The outer covering of the human body.
| Yes
| No
| Skin cells aren't normally inside other cells.{{acn}}
|-
| {{w|Hypoallergenic}} filling
| Materials that cause relatively fewer allergic reactions.
| Yes
| No
| Consumer product term.
|-
| {{w|Lithosphere}}
| The rigid outer part of the earth, consisting of the crust and upper mantle.
| Yes
| No
| Term from geology; part of the Earth's crust.
|-
| {{w|Mantle}} 
| The layer of the earth between the crust and the core.
| Yes
| No
| Misplaced geological term with many other meanings.
|-
| {{w|Midichlorians}}
| Fictional microorganisms in the {{w|Star Wars}} universe, which confer Force sensitivity and thereby {{w|Jedi}} associated powers.
| No
| Fictional
| It's unclear whether {{w|George Lucas}} intended for "midi-chlorians" to be {{w|Symbiogenesis|endosymbiotic organelles}} or internal {{w|Symbiosis|symbionts}}.
|-
| {{w|Mitochondria}}
| Organelles that generate energy for the cell.
| Yes
| Yes
| Actual cell organelles, widely known as the "powerhouse of the cell."
|-
| Natural flavor
| Flavoring derived from natural sources.
| Yes
| Conceivably
| A common ingredient on labels, usually meaning any substance to add flavor, aroma, or both, other than synthetic chemicals which are referred to as artificial flavors.
|-
| {{w|Norton AntiVirus}}
| A software product designed to protect computers from malware.
| Yes
| No
| Computer viruses and biological viruses are completely different, and systems designed to counter one generally don't work for the other. Many cell types do have antiviral mechanisms, notably the {{w|CRISPR}} (Clustered Regularly Interspaced Short Palindromic Repeats) DNA sequences in prokaryotes, which resist viral (bacteriophage) infection. However, the cell shown is not prokaryotic, since it contains a nucleus.
|-
| {{w|Nucleolus}}
| A small dense spherical structure in the nucleus of a cell during {{w|interphase}}.
| Yes
| Yes
| Actual cell organelle, involved in {{w|ribosome}} production.
|-
| Nucleoloulous
| Not a real term.
| No
| No
| A humorous continuation of the terms "nucleus" and "nucleolus."
|-
| {{w|Cell nucleus|Nucleus}}
| The central and most important part of an object, forming the basis for its activity and growth.
| Yes
| Yes
| Actual cell organelle which houses genetic material.
|-
| {{w|Nucleon}}s
| Protons and neutrons in the nucleus of an atom.
| Yes
| No
| The depicted circles are far too big to be actual nucleons.
|-
| {{w|O-ring}}
| A mechanical gasket in the shape of a torus; used to seal connections.
| Yes
| No
| Engineering term.
|-
| {{w|Pith}}
| The central tissue in plants, used for nutrient transport.
| Yes
| No
| Botanical term.
|-
| {{w|Pleiades}}
| A cluster of stars in the constellation Taurus.
| Yes
| No
| Even a single star is far too big to fit in a cell.{{cn}}
|-
| {{w|Rough endoplasmic reticulum}}
| Endoplasmic reticulum with {{w|ribosomes}} attached, involved in protein synthesis.
| Yes
| Yes
| Actual cell organelle. "Rough" refers to the presence of ribosomes covering its membrane, which translate {{w|messenger RNA}} into polypeptide chains. Normally the endoplasmic reticulum would wrap around the cell nucleus.
|-
| {{w|Seed}}s
| Plant embryos used for reproduction.
| Yes
| No
| Seeds are multicellular, and sometimes contain small proportions of non-cellular tissue.
|-
| {{w|Slime}}
| A moist, soft, and slippery substance.
| Yes
| Conceivably
| Could refer to the texture and appearance of {{w|cytoplasm}}, but not specific to cells.
|-
| {{w|Smooth endoplasmic reticulum}}
| A network of tubular membranes within the cytoplasm of the cell, involved in the transport of materials.
| Yes
| Yes
| A standard term for the smooth (i.e., not ribosome-covered) portion of the endoplasmic reticulum.
|-
| Sticky endoplasmic reticulum
| Not a real term.{{acn}}
| No
| No
| Another humorous twist on the actual types of endoplasmic reticula.
|-
| {{w|Ventricle}}
| A chamber of the heart that pumps blood out.
| Yes
| No
| Ventricles are actually part of the body, and they are composed of many cells. Possibly a pun on {{w|vesicle}} (or {{w|vacuole}}), a small membrane-enclosed vessel, such as the transport vesicles that carry polypeptides from the rough endoplasmic reticulum to the Golgi apparatus for processing.
|-
| {{w|Vitreous humour}}
| The clear gel that fills the space between the lens and the retina in the eyeball.
| Yes
| No
| The vitreous humor is in eyes, not cells.
|-
| Weak spot
| A vulnerable point.
| Yes
| Conceivably
| {{w|Cell membrane}} surfaces do indeed vary in strength, often due to the presence of organelles such as {{w|ion channel pore}}s or {{w|porosome}}s, both of which can be leveraged by viruses to enter cells.
|}

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

Cell Organelles

[A cell is shown with the following structures and areas labeled, counter-clockwise from upper left:]

* Smooth endoplasmic reticulum
* Lithosphere
* O-Ring
* Pith
* Nucleus
* Nucleolus
* Nucleoloulous
* Nucleons
* Drain plug
* Evil endoplasmic reticulum
* Hypoallergenic filling
* Weak spot
* Mitochondria
* Midichlorians
* Chloroplasts if you're lucky
* Human skin
* Carbonation
* Golgi
* Golgi apparatus
* Norton AntiVirus
* Sticky endoplasmic reticulum
* Pleiades
* Natural flavor
* Cellophane
* Rough endoplasmic reticulum

[These labels are inside the cell:]

* Ventricle
* Mantle
* Slime
* Vitreous humour
* Seeds

{{comic discussion}}

[[Category:Biology]]

2941: Cell Organelles

2024-06-03T21:27:15Z

172.68.23.74: /* Transcript */ explain order

{{comic
| number = 2941
| date = June 3, 2024
| title = Cell Organelles
| image = cell_organelles_2x.png
| imagesize = 563x451px
| noexpand = true
| titletext = It's believed that Golgi was originally an independent organism who was eventually absorbed into our cells, where he began work on his Apparatus.
}}

==Explanation==
{{incomplete|Created by a GOLGI ENDOPLASMIC RETICULUM. Do NOT delete this tag too soon.}}

The comic depicts a cell diagram with a mix of real and fictional organelles, blending accurate biological terms with misplaced or absurd labels. While it includes actual cell components like the nucleus, mitochondria, and Golgi apparatus, it also inserts unrelated concepts from various fields such as geology, engineering, software, and pop culture. Terms like "evil endoplasmic reticulum" and "sticky endoplasmic reticulum" add a whimsical twist to familiar scientific terms. The comic plays on the complexity and diversity of cell structures by mixing in unrelated and humorous terms, highlighting the often confusing and intricate nature of scientific diagrams with clever wordplay and cross-disciplinary jokes.

The title text adds a humorous and fictional backstory to the Golgi apparatus, an essential cell organelle involved in processing and packaging proteins. It playfully suggests that Camillo Golgi, the scientist who discovered the Golgi apparatus, was originally an independent organism. This organism was supposedly absorbed into our cells, where it then started working on what is now known as the Golgi apparatus. The joke is a satirical take on {{w|Symbiogenesis|endosymbiotic theory}}, which posits that certain organelles within eukaryotic cells, like mitochondria and chloroplasts, originated from independent symbiotic prokaryotic organisms that were absorbed by a host cell. Golgi appears to be depicted in the comic as a tiny alien being.

{| class="wikitable"
|-
! Label
! Meaning
! Real?
! Cell organelle?
! Joke explanation
|-
| {{w|Carbonation}}
| Carbon dioxide dissolved in a liquid.
| Yes
| No
| Misplaced chemistry term.
|-
| {{w|Cellophane}}
| A thin, transparent sheet made of regenerated cellulose.
| Yes
| No
| Misplaced packaging material term.
|-
| {{w|Chloroplasts}} if you're lucky
| Organelles in plant cells responsible for photosynthesis.
| Yes
| Yes
| Actual cell organelles, only found in plant cells.
|-
| Drain plug
| A stopper for a drain.
| Yes
| Conceivably
| Misplaced plumbing term. Could conceivably refer to a {{w|ion channel pore|pore}} or excretion duct.
|-
| Evil endoplasmic reticulum
| Not a real term.
| No
| No
| A humorous twist on the actual {{w|endoplasmic reticulum}}, implying a malevolent version.
|-
| Golgi
| {{w|Camillo Golgi}} (1843–1926) was an Italian biologist and pathologist known for his works on the central nervous system, for whom the Golgi apparatus is named.
| Yes
| No
| Not a tiny alien being who merged with our cells as the depiction and title text implies.
|-
| {{w|Golgi apparatus}}
| A complex of vesicles and folded membranes involved in secretion and intracellular transport.
| Yes
| Yes
| Actual cell organelle.
|-
| Human skin
| The outer covering of the human body.
| Yes
| No
| Misplaced anatomical term.
|-
| {{w|Hypoallergenic}} filling
| Materials that do not cause allergic reactions.
| Yes
| No
| Misplaced consumer product term.
|-
| {{w|Lithosphere}}
| The rigid outer part of the earth, consisting of the crust and upper mantle.
| Yes
| No
| Misplaced geological term.
|-
| {{w|Mantle}} 
| The layer of the earth between the crust and the core.
| Yes
| No
| Misplaced geological term. Many other meanings.
|-
| {{w|Midichlorians}}
| Fictional microorganisms in the {{w|Star Wars}} universe, which confer Force sensitivity.
| Yes
| Fictional
| Unclear whether {{w|George Lucas}} intended for "midi-chlorians" to be {{w|Symbiogenesis|endosymbiotic organelles}} or internal {{w|Symbiosis|symbionts}}.
|-
| {{w|Mitochondria}}
| Organelles that generate energy for the cell.
| Yes
| Yes
| Actual cell organelles, known as the "powerhouse of the cell."
|-
| Natural flavor
| Flavoring derived from natural sources.
| Yes
| Conceivably
| Misplaced food industry term.
|-
| {{w|Norton AntiVirus}}
| A software product designed to protect computers from malware.
| Yes
| No
| Misplaced software term.
|-
| {{w|Nucleolus}}
| A small dense spherical structure in the nucleus of a cell during interphase.
| Yes
| Yes
| Actual cell organelle, involved in ribosome production.
|-
| Nucleoloulous
| Not a real term.
| No
| No
| A humorous exaggeration of "nucleolus."
|-
| {{w|Cell nucleus|Nucleus}}
| The central and most important part of an object, forming the basis for its activity and growth.
| Yes
| Yes
| Actual cell organelle which houses genetic material.
|-
| {{w|Nucleons}}
| Protons and neutrons in the nucleus of an atom.
| Yes
| No
| Misplaced physics term.
|-
| {{w|O-ring}}
| A mechanical gasket in the shape of a torus; used to seal connections.
| Yes
| No
| Misplaced engineering term.
|-
| {{w|Pith}}
| The central tissue in plants, used for nutrient transport.
| Yes
| No
| Misplaced botanical term.
|-
| {{w|Pleiades}}
| A cluster of stars in the constellation Taurus.
| Yes
| No
| Misplaced astronomical term.
|-
| {{w|Rough endoplasmic reticulum}}
| Endoplasmic reticulum with ribosomes attached, involved in protein synthesis.
| Yes
| Yes
| Actual cell organelle.
|-
| {{w|Seeds}}
| Plant embryos used for reproduction.
| Yes
| No
| Misplaced botanical term.
|-
| {{w|Slime}}
| A moist, soft, and slippery substance.
| Yes
| Conceivably
| Misplaced term; could refer to a general texture or appearance, not specific to cells.
|-
| {{w|Smooth endoplasmic reticulum}}
| A network of tubular membranes within the cytoplasm of the cell, involved in the transport of materials.
| Yes
| Yes
| Just a standard term for the smooth variant of endoplasmic reticulum.
|-
| Sticky endoplasmic reticulum
| Not a real term.
| No
| No
| A humorous twist on the actual endoplasmic reticulum.
|-
| {{w|Ventricle}}
| A chamber of the heart that pumps blood out.
| Yes
| No
| Misplaced anatomical term.
|-
| {{w|Vitreous humour}}
| The clear gel that fills the space between the lens and the retina in the eyeball.
| Yes
| No
| Misplaced anatomical term.
|-
| Weak spot
| A vulnerable point.
| Yes
| Conceivably
| Cell membrane surfaces do indeed vary in strength, often due to the presence of organelles such as {{w|ion channel pore}}s or similar ducts.
|}

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

Cell Organelles

[A cell is shown with the following structures and areas labeled, counter-clockwise from upper left then down the middle:]

* Smooth endoplasmic reticulum
* Lithosphere
* O-Ring
* Pith
* Nucleus
* Nucleolus
* Nucleoloulous
* Nucleons
* Drain plug
* Evil endoplasmic reticulum
* Hypoallergenic filling
* Weak spot
* Mitochondria
* Midichlorians
* Chloroplasts if you're lucky
* Human skin
* Carbonation
* Golgi
* Golgi apparatus
* Norton AntiVirus
* Sticky endoplasmic reticulum
* Pleiades
* Natural flavor
* Cellophane
* Rough endoplasmic reticulum
* Ventricle
* Mantle
* Slime
* Vitreous humour
* Seeds

{{comic discussion}}

2318: Dynamic Entropy

2024-05-30T04:49:49Z

172.68.23.74: /* Explanation */ xref

{{comic
| number = 2318
| date = June 10, 2020
| title = Dynamic Entropy
| image = dynamic_entropy.png
| titletext = Despite years of effort by my physics professors to normalize it, deep down I remain convinced that 'dynamical' is not really a word.
}}

==Explanation==
This is another one of [[Randall|Randall's]] [[:Category:Tips|Tips]], this time a [[:Category:Science tip|Science Tip]]. This time it is a bit special since it came less than three weeks after another Science Tip: [[2311: Confidence Interval]] (which was itself the first time that a non-Protip Tip type has been re-used). This is the first time a type of tip (that was not a [[:Category:Protip|Protip]]) has been used for two "tips comics" in a row.

This Science Tip suggests that if you have a cool new concept, you should call it ''dynamic entropy''.

{{w|Dynamic programming}} is a mathematical optimization method and computer programming method developed by {{w|Richard Bellman}} in the 1950s. The {{w|Dynamic programming#History|History section}} of the Wikipedia article contains the full paragraph from Bellman's autobiography that contains the quote that is in the comic strip. Bellman describes how he was doing mathematical research funded by the military at a time when the Secretary of Defense had a literal pathological fear of the word "research", and by extension, "mathematical". Bellman borrowed the word "dynamic" from physics as being both accurate for his work and as a word that in plain English has positive connotations and is never used in a pejorative sense (expressing contempt or disapproval). The word "dynamic" itself comes from the Greek ''dynamikos'', "powerful", which is a positive meaning in itself, and has been applied to topics in physics that are related to motion and forces and used in ordinary English to refer to things that exert power, force, growth, and change (dynamo, dynamite, and as an adjective). Even though those things aren't always good, when they're bad, we use other words instead (e.g. cancer undergoes {{w|metastasis}}, not "dynamism").

{{w|Entropy}} is a term from physics, specifically statistical mechanics, describing a property of a thermodynamic system. When {{w|Claude Shannon}} developed a mathematical framework for studying signal processing and communications systems, which became known as {{w|Information theory}}, he struggled to come up with a proper name for one mathematical concept in his theory that quantified amount of noise or uncertainty in a signal. Computer scientist {{w|John von Neumann}} noticed the similarity of the equations with some in thermodynamics and suggested, "You should {{w|Entropy (information theory)|call it entropy}}, for two reasons. In the first place your uncertainty function has been used in statistical mechanics under that name, so it already has a name. In the second place, and more important, no one really knows what entropy really is, so in a debate you will always have the advantage." (see {{w|History of information theory#Entropy in statistical mechanics|History of information theory}}). Please see also the discussion of particle and quantum entropy in [[1862: Particle Properties]].

The naming of dynamic programming and of entropy in information theory are both examples of scientists choosing a name for what were at least partially very non-scientific seeming reasons. In one case because it has only positive and no negative connotations in plain English. In the other case because there is much confusion over the meaning of the word so Shannon would be free to adopt it in a new context. [[Randall]] is claiming that would make them great to put together to name some new concept; the combination will mean whatever the creator wants it to mean (even able to change mid-debate), and never sound bad the way that e.g. {{w|cold fusion}} has come to be.

Even though the caption implies that "dynamic entropy" would be available as a new name, it has actually been used in physics<ref>Allegrini, P., Douglas, J. F., & Glotzer, S. C. (1999). Dynamic entropy as a measure of caging and persistent particle motion in supercooled liquids. Physical Review E, 60(5), 5714, doi: 10.1103/physreve.60.5714.</ref>, probability<ref>Asadi, M., Ebrahimi, N., Hamedani, G., & Soofi, E. (2004). Maximum Dynamic Entropy Models. Journal of Applied Probability, 41(2), 379-390. Retrieved June 11, 2020, from www.jstor.org/stable/3216023</ref>, computer science<ref>S. Satpathy et al., "An All-Digital Unified Static/Dynamic Entropy Generator Featuring Self-Calibrating Hierarchical Von Neumann Extraction for Secure Privacy-Preserving Mutual Authentication in IoT Mote Platforms," 2018 IEEE Symposium on VLSI Circuits, Honolulu, HI, 2018, pp. 169-170, doi: 10.1109/VLSIC.2018.8502369.</ref>, and even the term "dynamical entropy" in physics<ref>Green, J. R., Costa, A. B., Grzybowski, B. A., & Szleifer, I. (2013). Relationship between dynamical entropy and energy dissipation far from thermodynamic equilibrium. Proceedings of the National Academy of Sciences, 110(41), 16339-16343.</ref><ref>Słomczyński, W., & Szczepanek, A. (2017). Quantum dynamical entropy, chaotic unitaries and complex Hadamard matrices. IEEE Transactions on Information Theory, 63(12), 7821-7831, doi: 10.1109/TIT.2017.2751507.</ref> and bioscience<ref>Chakrabarti, C. G., & Ghosh, K. (2013). Dynamical entropy via entropy of non-random matrices: Application to stability and complexity in modelling ecosystems. Mathematical biosciences, 245(2), 278-281, doi: 10.1016/j.mbs.2013.07.016.</ref>.

In the title text Randall mentions that, even though his physics professors have continued to use the word "dynamical", "trying to normalize it" by repetitive usage, he remains convinced that it is not really a word. Presumably he doesn't like that it has two suffixes used to make words into adjectives, -ic and -al, as if "dynamic" wasn't already positive enough. The [https://www.thefreedictionary.com/Commonly-Confused-Suffixes-ic-vs-ical.htm#:~:text=Words%20ending%20in%20%E2%80%9C%2Dic%E2%80%9D,are%20notoriously%20difficult%20to%20distinguish Free Dictionary] discusses how -ic and -ical suffixes are confused in many common words and explains their different uses.

The term "dynamical" in physics generally is used in "{{w|Dynamical system}}" or as an adjective to name a concept as applied to dynamical systems such as "dynamical entropy"<ref>Atmanspacher, H. (1997) "Dynamical entropy in dynamical systems," in ''Time, temporality, now'' (pp. 327-346). Springer, Berlin, Heidelberg, doi: 10.1007/978-3-642-60707-3_22</ref>.

==Transcript==
:[One panel only with text and a few lines and arrows. There are two columns each with a heading. Beneath each heading is a quote written on four lines. Below the quote, in grey font, and indented, starting with a hyphen, with the text aligned to the right of this are five lines of text. This explains who the quote belongs to and where it was stated (in brackets at the end). From the bottom of each of these two gray text paragraphs gray curved arrows goes down to two gray lines. Below each of these two lines are one large word per line. They are again in black text.]
:<big>Dynamic</big>
:"It's impossible to use the word 'dynamic' in the pejorative sense... Thus, I thought 'Dynamic Programming' was a good name."
::- Richard Bellman, explaining how he picked a name for his math research to try to protect it from criticism (''Eye of the Hurricane'', 1984)

:<big>Entropy</big>
:"You should call it 'Entropy'... No one knows what entropy really is, so in a debate you will always have the advantage."
::- John von Neumann, to Claude Shannon, on why he should borrow the physics term in information theory (as told to Myron Tribus)

:::<big><big>'''''Dynamic Entropy'''''</big></big>

:[Caption below the panel:]
:Science Tip: If you have a cool concept you need a name for, try "Dynamic Entropy."

== Trivia ==

Many of {{w|Buckminster Fuller}}'s designs and works were associated with the word "{{w|dymaxion}}", a combination of the words "dynamic", "maximum", and "tension", all words that Fuller himself used a lot in talking about his work, and which are words that simultaneously have use in science and positive connotations in lay English.

==References==
<references />

{{comic discussion}}

[[Category:Science tip]]
[[Category:Comics featuring real people]]
[[Category:Science]]
[[Category:Physics]]
[[Category:Programming]]

Talk:2939: Complexity Analysis

2024-05-29T23:26:38Z

172.68.23.74: Typo! :P.

I could be mistaken, but I think the "Best case" doesn't actually describe a situation where the algorithm takes the minimum amount of time. Rather, it describes that the algorithm wasn't necessary in the first place, possibly due to something like the list incidentally already being sorted. [[Special:Contributions/172.68.23.74|172.68.23.74]] 23:25, 29 May 2024 (UTC)

Talk:2939: Complexity Analysis

2024-05-29T23:25:49Z

172.68.23.74:

I could be mistaken, but I think the "Best case" doesn't actually describe to a situation where the algorithm takes the minimum amount of time. Rather, it describes that the algorithm wasn't necessary in the first place, possibly due to something like the list incidentally already being sorted. [[Special:Contributions/172.68.23.74|172.68.23.74]] 23:25, 29 May 2024 (UTC)

Talk:2934: Bloom Filter

2024-05-18T00:10:14Z

172.68.23.74: comment

It certaintly does contain a thing. [[Special:Contributions/172.68.23.74|172.68.23.74]] 00:10, 18 May 2024 (UTC)