explain xkcd - User contributions [en]

Talk:3142: (City)-Style Pizza

2025-09-16T14:01:23Z

MCBastos: Non-US pizza

Altoona-style is listed first in https://en.wikipedia.org/wiki/Pizza_in_the_United_States#Variations but that's because the list is alphabetical. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 21:12, 15 September 2025 (UTC)

I prefer +style pizza. [[User:SDSpivey|SDSpivey]] ([[User talk:SDSpivey|talk]]) 21:16, 15 September 2025 (UTC)
: Not a fan of electrons as a topping then? [[Special:Contributions/82.13.184.33|82.13.184.33]] 08:37, 16 September 2025 (UTC)

I’m pretty sure this comic is intended to be titled “<City>-Style Pizza”, as it is labeled in the HTML of xkcd.com (notably, xkcd.com itsel uses “-Style Pizza” for the <title> elements and the rss/atom feeds, but not for the visible title. (But there, the “<city>” gets swallowed by the browser)--[[User:Nleanba|Nleanba]] ([[User talk:Nleanba|talk]]) 21:49, 15 September 2025 (UTC)

Altoona-style most literally looks like a sandwich except cheese instead of a top bun《プロキシ》(XKCD中毒者) 21:54, 15 September 2025 (UTC)
:Yeah, a bunch of open-faced sandwiches side-by-side. [[Special:Contributions/47.248.235.170|47.248.235.170]] 22:07, 15 September 2025 (UTC)Pat
: It looks most like a heart attack in waiting. [[Special:Contributions/82.13.184.33|82.13.184.33]] 09:42, 16 September 2025 (UTC)

On a related note, locally (hint: absolutely nowhere near the place mentioned), there's a business advertising "genuine New York-style bagels". The juxtaposition of the "genuine" claim and yet the acknowledgement that they are only of the given ''style'' always makes me wonder what worth the genuineness truly has, with an ocean's-width of distance between any physical manifestation of New Yorkification and what we have here. [[Special:Contributions/92.17.62.87|92.17.62.87]] 23:12, 15 September 2025 (UTC)

I thought he was talking about Altoona Iowa (less than half the size of Altoona Pennsylvania). Look up “Altoona Iowa pizza” and one of the top hits will tell you it’s ranked one of the worst in the nation. You see, in Iowa, they lay out the dough, put on the ‘toppings’ (ahem) then dump on so much cheese that you can’t see any of the ‘toppings’ (ahem) anymore. When I came home from college in another state, I had to teach my mother how to make good pizza. [[Special:Contributions/2607:FB91:1D15:883A:11:B0B6:84B2:3C0C|2607:FB91:1D15:883A:11:B0B6:84B2:3C0C]] 23:49, 15 September 2025 (UTC)

Well at least THIS one was about a kind of pi. I guess pi does round to 3.142. [[Special:Contributions/138.88.96.2|138.88.96.2]] 00:16, 16 September 2025 (UTC)

Shame he missed out on Pittsburgh's 'specialty' with this... since they had the sheer audacity to call it 'Ohio Valley Pizza'... Which I hadn't even *heard* of, let alone actually seen, in 40 years of living in Cincinnati! -Edit: Turns out it originates from Steubenville, which had he named it 'Steubenville style pizza' would've put it way down on the bottom left somewhere. -Tiron [[Special:Contributions/2600:2B00:934E:6200:2186:FE87:5D5E:1AB7|2600:2B00:934E:6200:2186:FE87:5D5E:1AB7]] 01:18, 16 September 2025 (UTC)

Wikipedia has a way of displaying article titles that have non-standard characters in them. Could something similar be done here? [[User:Dogman15|Dogman15]] ([[User talk:Dogman15|talk]]) 04:05, 16 September 2025 (UTC)
:they do, but it doesn't work. {{w|WP:DISPLAYTITLE|DISPLAYTITLE}} doesn't support <> symbols. [[user:lett‪herebedarklight|raeb]] 13:29, 16 September 2025 (UTC)

The article is describing the Altoona style pizza, but Randall is calling on the viewer to look it up on Google images because the picture is likely more offensive than the description. I don't know what the wiki policy is but a picture in the article would do a much better job at explaining than anything Randall may or may not like about the ingredients. [[Special:Contributions/46.144.8.194|46.144.8.194]] 06:43, 16 September 2025 (UTC)

Surely it's no coincidence that XKCD 3142 is about pie. [[User:Gmcgath|Gmcgath]] ([[User talk:Gmcgath|talk]]) 11:43, 16 September 2025 (UTC)
:I hope it ''is'' a coincidence, because I'd like to think that Randall knows better than to call a pizza – a dish that isn't a pie – a "pie". [[User:Yorkshire Pudding|Yorkshire Pudding]] ([[User talk:Yorkshire Pudding|talk]]) 12:53, 16 September 2025 (UTC)
:: Says the person whose name is a pancake that calls itself a pudding. [[Special:Contributions/82.13.184.33|82.13.184.33]] 13:54, 16 September 2025 (UTC)

Randall suggests that pizza quality correlates with city size. That means Brazilians were right all along, and the best pizza is from São Paulo. [[User:MCBastos|MCBastos]] ([[User talk:MCBastos|talk]]) 14:01, 16 September 2025 (UTC)

2794: Alphabet Notes

2023-06-27T22:36:34Z

MCBastos:

{{comic
| number = 2794
| date = June 26, 2023
| title = Alphabet Notes
| image = alphabet notes.png
| titletext = Listen, you're very cute, but if you rearrange the alphabet to put U and I together it will RUIN the spacing!
}}

==Explanation==
{{incomplete|Created by a BAD U&I JOKE. Do NOT rearrange the alphabet too soon. Need more on MN!}}
This comic is a joke claiming the design documents and storyboards of the creation of the {{w|English alphabet}} have been found. The English alphabet is a {{w|Latin-script alphabet}} used to write modern English. It is organized around an A to Z alphabet, in black block letters, from left to right. Forming these supposed design notes are many red annotations:

#At the top, the vowels are listed. Randall apparently likes how these are spaced. He places a question mark near Y, as it sometimes functions as a vowel but sometimes functions as a consonant as well. Plus he seems to think the last five letters (maybe even six) of the alphabet should have been left out, see below.
#"A" is described favorably as the start.
#Randall considers the five early consonants B, C, D, F, and G to be acceptable but nothing special, with the exception of D which he considers solid. It's not clear if his judgement is based on the appearances of the glyphs, or the sounds that they correspond to. In speech, a {{w|consonant}} is a sound that is articulated by obstructing the vocal tract, producing a percussive kind of effect. In English phonology, D is the {{w|voiced alveolar plosive}}.
#The words "hi" and "no", which both appear uninterrupted when the letters of the English alphabet are listed from A-Z, are highlighted.
#That "ij" (in lowercase) may be considered friends because they both have dots in the lowercase version. No other characters are given lowercase treatment, however, to ''prove'' that these two are the only (common versions of) glyphs which cannot be written with a single press of the pen against the page. The separate dots and main strokes could also be interpreted as the heads and torsos of two reductionist character drawings. The symbols "i" and "j" are the respective mathematical and electrical-engineering notations of the {{w|Imaginary unit|square root of -1}}, and so may be considered both professionally and personally in a close relationship, as well as neighbours. There is also a {{w|Digraph (orthography)|digraph}}, or unconnected {{w|Ligature (writing)#Dutch IJ|ligature}}, of "ij" (or "IJ", as a leading capital) used as a letter in its own right (considered distinct from either "i" or "j") in the Netherlands. It should be noted that "J" {{w|J#History|appeared sometime around the Middle Ages}} as a variant of "I", explaining why they look similar and are located together in the alphabet.
#"Jk" ("just kidding") is an abbreviation originating from instant messaging, as is "LOL" (for "laughing out loud").
#In the standard "{{w|Alphabet song|alphabet song}}" for the US (sung to the tune of "Twinkle Twinkle Little Star"), most letters occur upon the beat of an easy and sedate tempo. But to scan ''and'' rhyme, the letters L-O are run through at double the tempo ("el-em-en-oh-pee"), with perhaps P best considered to cross two of the quick beats that end this musical phrase.
#Randall finds it weird that the dividing line between the two halves of the alphabet would go between M and N. It's not clear what exactly he thinks is weird about this. M and N are similar-looking letters, both consisting of a zigzag sequence of lines. Possibly Randall is commenting on the fortuitous coincidence that the sides of M and N are both straight and vertical, providing a natural lane through which to draw a dividing line. He also lists several words that contain MN in sequence, and speculates on the significance of this rare digram seemingly only being used for "fancy" words.
#Randall considers the placement of "Q" strange. He may even consider the existence of "Q" strange, perhaps because the sound "Q" denotes in English could be replaced with the digraph "KW". "C" and "X" are also replaceable with single or multiple alternate characters in English. These include "S" or "K" for the former ("accent" could perhaps be re-written as "aksent", but it is unknown what would replace the "C" in words like church.) and "(C)KS" (e.g. "ax(e)" as "aks") or "Z" (regarding "xylophone" or any "xeno-" word). But these, and other orthographic inconsistencies, are not obviously called out by Randall.
#Randall considers "RST" a strong cluster of consonants, possibly because that three-character sequence does occur in some words (eg. BURST, WORST). Both "strong" and "cluster" also include the letters R, S and T. The use of an {{w|R-S-T system|RST code}} is a traditional way of describing the reception quality of radio communications.
#Randall seems to be confused about "VW", it could refer to {{w|Volkswagen}}, or he might wonder why "W" is called "double U" rather than "double V". Or why both are needed. Both "{{w|W#History|W}}" and "{{w|U#History|U}}" are derived from "V", which might explain a lot.
#Randall questions whether "X" is even a letter. It is the Roman numeral for 10, though he does not complain about C, D, I, L, M or V in the same way so he is most likely talking of ''x'' as used in algebraic contexts. Alternatively, he could simply be talking about the appearance of the letter "X".
#The comment that the alphabet may have been better if it had stopped at "T" is likely a reference to the fact that {{w|Phoenician alphabet|the original Phoenician script}}, which is the ancestor of many modern scripts including English, had as its last letter {{w|Taw}}, which the modern letter "T" is derived from. It is still the last letter of the modern Hebrew alphabet, although the Greek alphabet added several letters after it, some of which persist into modern English. Randall seems to believe that the Phoenician script was fine as-is and that the letters U-Z are weird and/or unnecessary.

The title text makes a joke about the pick-up line "If I could rearrange the alphabet, I'd put 'U' and 'I' together.", where the letters "U" and "I" are pronounced like the pronouns "you" and "I". It is such a corny act of flirtation that any recipient of it could easily have a rejection (''or'' a flirty acceptance, if they so wish) ready to respond with in an appropriate vein. As well as reflecting the diagram's noted preference for well-spaced vowels, it might be presumed that anyone (unironically) using the "U and I" line might be left dumbfounded at the rather technical nature of the riposte. This pickup line was also the subject of [[1069: Alphabet]]. The word "ruin" does indeed have 'u' and 'i' together.

==Transcript==
{{incomplete transcript}}
:[A list of the letters of the alphabet, from A to Z, in black]
:ABCDEFGHIJKLMNOPQRSTUVWXYZ

:[A red line above the letters, with tick marks and their associated vowels at A, E, I, O, and U. Y has a question mark instead of a tick.]
:Love the spacing between the vowels!

:[Red annotations near various letters.]

:A: Strong start!
:BCD, FG: Decent consonants but no real heavy hitters here in the first third ("D" is solid, at least)
:HI: Hi!
::IJ: [additional lowercase "ij" given, in red]: The dotted letters are friends!
:JK: Jk (lol)
:LMNOP: Part that's fun to sing
::Weird how the line between "M" and "N" is the halfway mark.
::They're similar, but "MN" only shows up in fancy words like "mnemonic", "column", "amnesty", and "hymn", significance??
:NO: No
:Q: Why is this ''here?''
:RST: Strong cluster!
:U: Weirdest of the main 5 vowels by far
:VWXYZ: Haunted letters (keep out!!)
:VW: ??
:X: Not sure this is even a letter. Did you include a number by mistake?
::...Listen.
::Maybe we should've stopped at "T".

:[Caption below the panel:]
:Design notes on the alphabet

{{comic discussion}}

[[Category:Language]]
[[Category:Comics with color]]
[[Category:Comics with red annotations]]
[[Category:Comics with lowercase text]]

2723: Outdated Periodic Table

2023-01-12T15:17:26Z

MCBastos: Fix link to previous comic so it points to this wiki instead of the Wikipedia

{{comic
| number = 2723
| date = January 11, 2023
| title = Outdated Periodic Table
| image = outdated_periodic_table_2x.png
| imagesize = 360x350px
| noexpand = true
| titletext = Researchers claim to have synthesized six additional elements in the second row, temporarily named 'pentium' through 'unnilium'.
}}

==Explanation==
{{incomplete|Created by BERYLLIUM-BASED LIFE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic shows figure 6.14 from a science text book, which displays ''The periodic table of the elements'', but with only the first four elements are shown ({{w|Hydrogen}}, {{w|Helium}}, {{w|Lithium}} and {{w|Berylium}}). [[Randall]] claims, in the caption, that you can use the layout of an included {{w|Periodic table}} to date a publication based upon the elements present or missing. The joke here is that his book was somehow published just half an hour after the {{w|Big Bang}}, at which time those four elements were the only ones present.

From about 10 seconds until about 20 minutes after the Big Bang, the phase that is known as the {{w|Big Bang nucleosynthesis}} occurred. At that time, hydrogen ions (single photons) provided for helium in abundance and traces of lithium. Some berylium-7 was also formed, which is an unstable {{w|Isotopes of beryllium|isotope}}, and with a half life of 53 days, an appreciable amount of what had been created would still be there several months after the Big Bang, and certainly most of what was created would be there half an hour after.

The conclusion is that Randall's science book was published when those four elements were the only ones in existence, and before the point where practically all the beryllium had decayed. After that point, only the three first would be present, until star formation began and started the process of {{w|Stellar nucleosynthesis}}.

Of course no life as we know it could exist until long after stellar nucleosynthesis had created all the other elements needed to support {{w|Carbon-based life}}. And no life, as we could even imagine, would be able to exist for the first 370,000 years after Big Bang as atoms (in a form that could eventually form molecules) could not exist until the {{w|Recombination (cosmology)|Recombination}} phase of the universe, due to the high energy of the {{w|Cosmic background radiation}}. Textbooks, also being Carbon-based {{Citation needed}} could not exist either.

Many {{w|Chemical elements|elements}} do not occur naturally on earth and have to be {{w|Synthetic element|synthesized}}. And others are very hard to detect, collect enough in pure form or purify enough to discover them. Until these elements were discovered one way or another they where not included in the periodic table. Or at least only as theoretical elements expected to be in a given position.

Because (paper versions) of scientific textbooks do not update themselves after being published, one can determine the age of a scientific textbook by checking which elements are present in the textbook's periodic table. And Randall's joke is that those four in the figure date the book as published around half an hour after the Big Bang. (A few years after that Berylium would be gone, and a periodic table created at that time would only show the first three elements).

The title text refers to how yet-undiscovered elements are given a {{w|systematic element name}} as a temporary name according to how many protons they have. The names consists of Greek and Latin roots and adding an -ium at the end. The claim in the title text is that in the text book with the figure, researchers claim they have synthesized six additional elements in the second row, temporarily named 'pentium' through 'unnilium'.

Elements that cannot be found natural on Earth (or anywhere in the Universe) are generally excluded from the periodic table until they have been synthesized (and are no longer theoretical). And if elements are added to the end of the table, but it is still uncertain if they have been synthesized or who should give the new element a name, then a number system has been used, just calling for instance element 118, simply 118 using the Latin or Greek words for it digits: "Ununoctium". At the time of release of this comic, element number 118 has already been synthesized and had been called {{w|Oganesson}} and there was at that time no longer any elements higher than 118 named using this naming convention. This has been mentioned in the title text of [[2639: Periodic Table Changes]], the previous comic to draw a periodic table.

In the title text the new elements numbers are very low ("pentium" being based on "pent" which means "five", and thus would refer to {{w|Boron}}) because only the four elements shown in the figure had been discovered at the time of publication. ({{w|Pentium}} is also the name of a series of microprocessors launched by Intel in the 1990s). The term "unnilium" is a description of the digits of ten, i.e. 1 0, using the numerical roots established by convention, and would refer to {{w|Neon}}. In reality, had Neon once been a hypothetical element, it would more likely have been called something along the lines of "decium".

Since life could not have existed at the time this book should have been published, the idea of researches synthesizing elements is of course just part of the joke.

Interestingly, despite helium being one of the first elements to exist, it did not appear in the earliest period tables. Because the noble gasses do not react chemically, they were unknown to human scientists until the late 19th century.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Subheading]: Figure 6.14
:[Title]: The periodic table of the elements

:[The following four rectangles featuring the large element abbreviation, with the full element name written below, in a typical periodic table style]
:[Top row, far left]: H Hydrogen
:[Top row, far right, detached from any other box]: He Helium
:[Bottom row, attached directly below the "H" box]: Li Lithium
:[Bottom row, attached directly to the right of "Li"]: Be Beryllium

:[Caption below the panel]:
:You can spot an outdated science textbook by checking the bottom of the periodic table for missing elements. For example, mine was published half an hour after the Big Bang.

{{comic discussion}}
[[Category:Chemistry]]
[[Category:Cosmology]]

Talk:2193: Well-Ordering Principle

2019-08-24T17:20:24Z

MCBastos:

Still a "trap": POOF, you're now the worst McFly cosplayer; here's a mirror.
:She asked about people who 'tried' to dress as Marty McFly. So unless Megan has ever tried to dress as him, I don't think she can be the answer.[[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:10, 24 August 2019 (UTC)

*Are* costumes well-ordered? Even leaving aside the subjectivity of any ranking, there are several different criteria which could be used, and many ways of combining them. (What if the costume which looked least like Marty wasn't the ugliest, nor the one showing least effort?) — Also, may be worth qualifying the explanation of Halloween by mentioning the USA; some other countries don't celebrate it, and of those that do, not all do trick-or-treating or dressing-up &c. [[User:Gidds|Gidds]] ([[User talk:Gidds|talk]]) 00:23, 24 August 2019 (UTC)

::Saying there are different criteria kind of overlaps with saying the ranking is subjective. But far worse, even individual preferences are preorders aka quasiorders, which absolutely does mean that there may not be a worst, or even a set of costumes tied for worst. However, the fact that you can always find someone (e.g. on Amazon Mechanical Turk, or off the street, or on a wiki somewhere) to give you another opinion means that well-foundedness can be rescued with their {{w|mean opinion score}}. I wonder if the genie is powerful enough to know the asymptotic MOS ranking right away, or if it will have to wait for enough Amazon Mechanical Turk HITs to be completed. Given that there must have been at least hundreds of thousands of consumes so far, that could take quite a long time to achieve p<0.05. [[Special:Contributions/172.69.22.248|172.69.22.248]] 04:00, 24 August 2019 (UTC)
::I've spent way too much time on this, but the more I do, the more I think Randall is trying to say something about the simulation hypothesis, related to the theme on [https://www.youtube.com/watch?v=th5uJNB7VU8 ''Watch Room''] (warning: somewhat creepy but otherwise ok sci-fi short.) [[Special:Contributions/172.69.22.134|172.69.22.134]] 12:32, 24 August 2019 (UTC)

I hope this Munroe lowkey challenging the internet, that we might actually celebrate our infamous king (or girl marty queen) of crappy costume. --[[Special:Contributions/162.158.58.219|162.158.58.219]] 00:37, 24 August 2019 (UTC)

The "worst McFly" and "even" sounds like there should be a math pun in there somewhere, but I don't see it. [[Special:Contributions/172.69.63.11|172.69.63.11]] 01:36, 24 August 2019 (UTC)

"It's been over 30 years since Back to the Future came out." That makes me feel old. Isn't that something that Munroe does regularly? Should that be mentioned in the explanation? [[Special:Contributions/162.158.214.88|162.158.214.88]] 10:42, 24 August 2019 (UTC)
:Yes, I am sure there have been at least two comics where the often surprising ages of things formed a central part of the theme, but I can't remember enough about them to find them. Anyone? [[Special:Contributions/162.158.255.82|162.158.255.82]] 11:55, 24 August 2019 (UTC)
::Just see [[:Category:Comics to make one feel old]] :-). --[[User:DaB.|DaB.]] ([[User talk:DaB.|talk]]) 12:29, 24 August 2019 (UTC)
:::Thanks {{done}} [[Special:Contributions/172.69.22.134|172.69.22.134]] 12:38, 24 August 2019 (UTC)

"The real Worst McFly is probably lost to time" is also a pun regarding the fact that ''Back to the Future'' is a time-travel story.--[[User:MCBastos|MCBastos]] ([[User talk:MCBastos|talk]]) 17:20, 24 August 2019 (UTC)

2170: Coordinate Precision

2019-07-03T01:33:46Z

MCBastos: remove noincludes, they were breaking the front page

{{comic
| number = 2170
| date = July 1, 2019
| title = Coordinate Precision
| image = coordinate_precision.png
| titletext = 40 digits: You are optimistic about our understanding of the nature of distance itself.
}}

==Explanation==
{{incomplete|Created by a CARTOGRAPHER. Each table entry needs to be individually explained. Do NOT delete this tag too soon.}}

Coordinates are data points used to identify a location on the planet Earth. However, a given coordinate covers a square region of land, and thus leaves some ambiguity; thus, greater precision requires an increasing count of decimal points in your coordinates. This comic uses this information to roughly identify how precise a given coordinate length might be.

The coordinates at [https://tools.wmflabs.org/geohack/geohack.php?pagename=Cape_Canaveral&params=28.52345_N_80.68309_W_type:landmark_region:US-FL_scale:10000 28.52345°N, 80.68309°W] (in {{w|decimal degrees}} form; in {{w|geographic coordinate system}} form using degrees, minutes, and seconds, 28° 31' 24.24.4?N, 80° 40' 59.1?W) are pointing to the {{w|Rocket Garden}} at {{w|Kennedy Space Center}} in {{w|Merritt Island, Florida}} (usually referred to as '''{{w|Cape Canaveral}}''')—specifically, the tip of the [https://www.kennedyspacecenter.com/-/media/DNC/KSCVC/Blog-Images/Rocket-Garden/rocket-garden-with-labels.ashx?h=860&w=1173&la=en&hash=7B9ADC7AFF5370E462AC98D9651945B806B77B2C Delta] rocket.

The sixth entry in the table, with seven digits of precision, includes the caveat that, while your coordinates map to areas small enough on the Earth's surface to indicate pointing to a specific person in a room, "since you didn't include datum information, we can't tell who". This is probably a reference to the fact that persons are animate, and different persons can occupy the same position at different times. It might also be a reference to the various ''{{w|geodetic datum}}'' or ''geodetic systems'' — different ways of dealing with the fact that the earth is neither perfectly spherical nor perfectly an oblong ellipsoid. The various data do not make much difference at six digits of precision, but at seven, there is enough skew depending on which system is in use that the person in a room you are referring to with the coordinates is ambiguous. It is unstated, but the remaining lines in the table with ever-greater precision suffer from this same issue and are equally ambiguous without datum information.

The final entry, with seventeen digits of precision, suggests that either the user is referring to individual atoms in the much-larger-scale whole-Earth coordinate system, or (perhaps more likely) has not bothered to format the values from the GPS module for viewing in the software UI in any way whatsoever, resulting in a value that is {{w|False precision|meaninglessly precise}} because the measurement wasn't that {{w|Accuracy and precision|accurate}} to begin with. Even if the value is accurate, locating individual atoms by coordinates is not actually useful in most cases, and the motions of multiple systems within our physical world (continental drift, subtle vibrations, etc.) would render the precise value obsolete rather quickly.

For the decimal places past the 5th on the latitude, the digits given are actually the decimal expansion of the constant ''e'' (2.7182818284), while for the decimal places past the 6th on the longitude, the digits given are the decimal expansion of the constant ''pi'' (3.14159265358).

The title text references how at sufficiently small distances, our understanding of reality itself begins to break down. Smaller than the {{w|Planck length}}, which is more than a quintillion times smaller than the diameter of a proton, the ideals of Euclidean geometry no longer apply and space itself may be composed of a {{w|quantum foam}} where the very geometry of spacetime itself fluctuates, meaning coordinate systems based on an assumption that space doesn't change would no longer work. String theory, on the other hand, assumes that at a short enough distance the world is composed of ten space dimensions, which precludes the use of a two-dimensional coordinate system.

The actual number of longitude digits needed to identify a point with particular precision depends on your latitude. Near the equator, you need more longitude digits than at the poles. The number of latitude digits for some particular accuracy stays essentially the same everywhere. Close to the poles, the chart is increasingly wrong for this reason.

==Chart==

{| class="wikitable"
|-
! Decimal places
! Resolution*
! In the comic
! Location
! Explanation/notes
|-
| 0
| 110 km (70 mi)
| Something space-related
| Somewhere near the east coast of Florida
| This resolution is enough to point out a large-scale feature like a country, a mountain range, a large lake, or a significant island on a map of the world. It can also be used to tell if certain celestial phenomena are visible from a given location.
|-
| 1
| 11 km (7 mi)
| A specific city
| Cape Canaveral
| Cities typically span a couple kilometers/miles in diameter and are far enough from each other to distinguish them at this resolution. There are exceptions though, and the veracity of this statement depends greatly on what constitutes a “city”, which varies greatly by location and history.
|-
| 2
| 1.1 km (¾ mi)
| A neighborhood
| Kennedy Space Center Visitor Complex
|
|-
| 3
| 110 m (360 ft)
| A suburban cul-de-sac
| The Rocket Garden at the Kennedy Space Center
|
|-
| 4
| 11 m (36 ft)
| A particular corner of a house
| Somewhere near the center of the Rocket Garden
|
|-
| 5
| 1.1 m (3½ ft)
| A specific person in a room (given geodetic datum information)
| The [https://www.kennedyspacecenter.com/-/media/DNC/KSCVC/Blog-Images/Rocket-Garden/rocket-garden-with-labels.ashx?h=860&w=1173&la=en&hash=7B9ADC7AFF5370E462AC98D9651945B806B77B2C Thor-Delta] rocket in Rocket Garden
| As the comic notes, different persons can occupy the same position at different times. It might also point to the differences between {{w|geodetic datum}}s – different ways to map geodetic coordinates to specific points on the Earth's surface – become large enough that one needs to specify the one in use when supplying coordinates to this degree of precision (or greater, of course). Since the Earth is not a perfect ellipsoid, different parts of the planet conform best to ellipsoids of slightly different proportions, resulting in different coordinates for a specific location; not to mention that locally used datums have local reference points, which means that the local and global standards are slowly drifting away from each other with the tectonical plates.
Note that the comment in the comic concerns only the {{w|North American Datum|NAD 1983}} datum which is fairly close to the international, “one size fits all” standard {{w|WGS-84}}. Other datums may be shifted by tens or even hundreds of meters (yards), making geodetic datum specification necessary for less precise coordinates as well.
|-
| 7
| 1.1 cm (7/16 in)
| Waldo on a page
| Presumably the very tip of the rocket.
| Precisely finding Waldo on a page was also referenced in [[1358:_NRO|#1358]].
|-
| 9
| 0.11 mm (4? thou)
| A specific grain of sand
| rowspan=3 | N/A
|
|-
| 15
| 110 pm (1.1 Å)
| Raw floating point precision or an individual atom
| A double-precision (64-bit) floating point variable stores 52 significant bits (with an implicit 1 in front), so that 180.00000000000000 and 179.99999999999997 may be represented as distinct values. (This is only 14 decimals, however; the larger the integral part, the fewer bits remain to represent the fractional part.) This level of precision is useful for mitigating rounding errors in computations, but this advantage only shows if the last few digits are treated as non-significant and thus, ideally, hidden from view.
To actually track individual atoms (which may be as close to one another as 32 pm) or to represent continental drift up to the second, one would need to work with coordinates in ''quadruple'' precision. Tracking atoms, however, needs very sensitive (and expensive) equipment with a severely limited range (according to our current understanding of science and technology). Using a global-scale coordinate system when a micrometer-scale would fit much better is either an abuse of the system and a great waste of memory and computing power, or it means that a significant portion of the Earth's surface has been blanketed by quantum microscopes, which would be an abuse and a waste of many other things as well.
|-
| 40
| 1.1 × 10–11 ym (1.1 × 10–35 m)
| Near (or past) our current understanding of the nature of distance
| This is where the resolution reaches the Planck length. At this scale, the very structure of spacetime (and thus, the notion of distance) may be different than what we know; measuring anything to Planck length precision would necessitate such tremendous amounts of energy in one place. This would both create minuscule black holes and, more importantly, move whatever particle you were trying to pinpoint.
|}
<nowiki>*</nowiki>Since the Earth is not exactly spherical, the actual length of one degree of latitude varies between 110.574 km (68.707 mi) at the equator and 111.694 km (69.403 mi) at the poles, while one degree of longitude is 111.320 km (69.171 mi) at the equator, 55.800 km (34.673 mi) at lat. 60°, and 0 km (0 mi) at the poles.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Single panel containing a table with two columns for "Lat/Lon Precision" and "Meaning" and a caption above the table.]
:Caption: What The Number of Digits in Your Coordinates Means

:[Row 1]
:Lat/Lon: 28°N, 80°W
:Meaning: You're probably doing something space-related

:[Row 2]
:Lat/Lon: 28.5°N, 80.6°W
:Meaning: You're pointing out a specific city

:[Row 3]
:Lat/Lon: 28.52°N, 80.68°W
:Meaning: You're pointing out a neighborhood

:[Row 4]
:Lat/Lon: 28.523°N, 80.683°W
:Meaning: You're pointing out a specific suburban cul-de-sac

:[Row 5]
:Lat/Lon: 28.5234°N, 80.6830°W
:Meaning: You're pointing to a particular corner of a house

:[Row 6]
:Lat/Lon: 28.52345°N, 80.68309°W
:Meaning: You're pointing to a specific person in a room, but since you didn't include datum information, we can't tell who

:[Row 7]
:Lat/Lon: 28.5234571°N, 80.6830941°W
:Meaning: You're pointing to Waldo on a page

:[Row 8]
:Lat/Lon: 28.523457182°N, 80.683094159°W
:Meaning: "Hey, check out this specific sand grain!"

:[Row 9]
:Lat/Lon: 28.523457182818284°N, 80.683094159265358°W
:Meaning: Either you're handing out raw floating point variables, or you've built a database to track individual atoms. In either case, please stop.

{{comic discussion}}

Talk:2092: Consensus New Year

2019-01-01T17:04:14Z

MCBastos:

Sorry for the server downtime, it should be fixed now. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 17:24, 31 December 2018 (UTC)

: So what was it? Hardware issue, failed software update, reconfiguration boo-boo, external attack, frozen process, Y2K+19 bug? [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 18:30, 31 December 2018 (UTC)
::To be honest: I don't know. But probably a mixture of "external attack" and "frozen process" AND my laziness to check the health of the Wiki by 24/7. I figured it out when the BOT couldn't do the proper updates and some refreshing restarts to some processes did the job. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 18:54, 31 December 2018 (UTC)

The leftmost label says "10:00 AM EST", but I'm 95% sure that it should be "5:00 AM EST". That makes sense both in terms of time zones / date lines, and also in terms of the number of hash marks (the 9th hash mark before 1:30 PM: 2 PM - 9 = 5 AM). --Brandon [[Special:Contributions/172.69.22.224|172.69.22.224]] 19:35, 31 December 2018 (UTC)
:Agreed. The minor scale tick marks appear to be at 1 hr increments past the "1:30 PM" denoted time. However that doesn't follow for before 1:00 pm to reach the labeled "10:00 AM" mark. [[Special:Contributions/172.68.34.88|172.68.34.88]] 20:59, 31 December 2018 (UTC)
:I suspect he failed to translate the label correctly to EST, since it would be 10:00 AM UST. I'm going to add some content into the explanation on the word "Consensus" from Wiktionary. It has multiple definitions that include both "agreement among the members of a given group" as in a common time to celebrate the New Year, as well as "Average projected value" that might also be applicable here. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 22:35, 31 December 2018 (UTC)
:I'm watching the xkcd page to see if Randall updates the comic image to correct this error. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 00:50, 1 January 2019 (UTC)

I'm actually not certain Randall '''suggests''' a time for universal celebration of New Year. Apart from the word "Consensus", there's nothing to suggest it. Rather, I read it as a stated time where a majority will agree to the statement that it's now 2019. [[Special:Contributions/141.101.96.187|141.101.96.187]] 22:38, 31 December 2018 (UTC)Wilhelm
: I agree that he's probably not suggesting everyone should celebrate at some common time - see my recent edit on the meaning of consensus in the explanation. [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 23:27, 31 December 2018 (UTC)

'''Happy NEW YEAR!!!'''

While Randall has to wait... in central Europe it just happened when I'm posting this. And in Germany we don't have only the "Autobahn" with no speed limit, every eighteen year old or older child plays with fireworks...

Nonetheless not only in California there are some people giving more attention to a much more unique event: New Horizons is passing {{w|(486958) 2014 MU69|Ultima Thule}}, six ''light hours'' away from Earth.
Let's see if Randall does cover this event. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 23:49, 31 December 2018 (UTC)

On the topic of Orthodox churches using shifted Julian calendar: I can't speak for the entire world, but here in Russia it's not really relevant, since the church calendar is limited to religious matters, and New Year is a secular holiday. (But Orthodox Christmas will in fact be observed on Jan 7th.) There ''is'' an obscure holiday called Old New Year that is New Year shifted to 14th, but hardly anyone celebrates it and it certainly doesn't replace the regular one. [[Special:Contributions/141.101.77.236|141.101.77.236]] 16:58, 1 January 2019 (UTC)

I note that 3:00PM (UTC-3) lists only "Northern" Brazil. That's kinda correct (should be actually "Northeastern" Brazil), but the South/Southwest, which is actually where the largest part of Brazilian population lives, is nowhere to be found. Due to DST, it ''should'' be in the 2:00PM line (UTC-2), but that line is blank. Unfortunately, I don't have the population numbers on hand to fix the entry, much less to fix the world population percentages on the table.--[[User:MCBastos|MCBastos]] ([[User talk:MCBastos|talk]]) 17:04, 1 January 2019 (UTC)