explain xkcd - User contributions [en]

Talk:2319: Large Number Formats

2020-06-13T01:56:14Z

172.68.255.14:

== Scientist avoiding rounding ==

Would love an explanation of the scientist avoiding rounding one. Would make sense to me with 2.525997..., but as 2.5997... I'm at a loss!

Truncating the number just before a digit less than 5 so that the final digit is not rounded up. (I do this all the time, and, I am a scientist.)

(The above was posted (anonymously?) seconds before I could get mine in, so here it is in the original format.)

This is probably completely irrelevant but it seems Randall made a small typo when trying to show a "Scientest trying to avoid rounding up."
I assume it should be 2.525997*10^13. It seems he left out a 5 and a 2 and I say such because whether he forgot the 52 or 25 is up for debate.

Relevant screenshot: [[https://i.imgur.com/NrvOivy.png]]

Also, if I'm just being completely daft and am missing something completely, please feel free to criticize me harshly and I'll go back to my little hideyhole. [[Special:Contributions/108.162.237.24|108.162.237.24]] 22:21, 12 June 2020 (UTC)

In reality, a scientist would probably say 6.416*10^13 cm. (Although possible counterpoint, this comic is really about the ''number'' 25,259,974,097,204, not the distance 25,259,974,097,204 inches.) [[Special:Contributions/172.69.33.207|172.69.33.207]] 22:47, 12 June 2020 (UTC)

Centimetres are not an SI unit. it would be 6.416*10^11 m [[Special:Contributions/172.68.255.14|172.68.255.14]] 01:56, 13 June 2020 (UTC)
I believe the "2.5997" was intentional, or at least I thought it was when reading it. At first I thought it was a typo, but Randall calls that number "Scientist ''trying'' to avoid rounding up" which makes me think Randall intentionally made that "mistake" as if the scientist had accidentally forgotten the first two digits (25) and used the remainder of the number (259974...), rounding it to "2.5997x10^13" [[User:Kirypto|Kirypto]] ([[User talk:Kirypto|talk]]) 23:03, 12 June 2020 (UTC)

As a (not so?) old British person, I approve. Let the Trillions come around later, when it's ''worth'' increasing the prefix to "level 3". Don't waste them on the more petty numbers. [[Special:Contributions/162.158.155.122|162.158.155.122]] 23:13, 12 June 2020 (UTC)

== "Engineering" notation omitted? ==

I find it somewhat strange that Randall doesn't offer '''25e12''' or any of those variants ('''25.259...*10^12'''). I feel like a lot of "non-normal" people would map billion to E12 instead of requiring a single digit to the left of the decimal point. shrug [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 23:09, 12 June 2020 (UTC)

==Actual scientist: ==
"What's an inch?" [[Special:Contributions/162.158.62.119|162.158.62.119]] 23:18, 12 June 2020 (UTC)
: The imaginary nano-scale multiple of the speed of light times Planck's constant. Which, dimensionally, would seem to be kg.m³/s²? [[Special:Contributions/162.158.154.73|162.158.154.73]] 00:15, 13 June 2020 (UTC)

As an article pointed out to me the other day that seemed obvious after it was said it's a non tarrif trade barrier used as American protectionism that doesn't get tarrifed back

== Can someone explain the set theory notation? ==

Talk:2319: Large Number Formats

2020-06-13T01:51:54Z

172.68.255.14: /* Scientist avoiding rounding */

== Scientist avoiding rounding ==

Would love an explanation of the scientist avoiding rounding one. Would make sense to me with 2.525997..., but as 2.5997... I'm at a loss!

Truncating the number just before a digit less than 5 so that the final digit is not rounded up. (I do this all the time, and, I am a scientist.)

(The above was posted (anonymously?) seconds before I could get mine in, so here it is in the original format.)

This is probably completely irrelevant but it seems Randall made a small typo when trying to show a "Scientest trying to avoid rounding up."
I assume it should be 2.525997*10^13. It seems he left out a 5 and a 2 and I say such because whether he forgot the 52 or 25 is up for debate.

Relevant screenshot: [[https://i.imgur.com/NrvOivy.png]]

Also, if I'm just being completely daft and am missing something completely, please feel free to criticize me harshly and I'll go back to my little hideyhole. [[Special:Contributions/108.162.237.24|108.162.237.24]] 22:21, 12 June 2020 (UTC)

In reality, a scientist would probably say 6.416*10^13 cm. (Although possible counterpoint, this comic is really about the ''number'' 25,259,974,097,204, not the distance 25,259,974,097,204 inches.) [[Special:Contributions/172.69.33.207|172.69.33.207]] 22:47, 12 June 2020 (UTC)

Centimetres are not an SI unit. it would be 6.416*10^11 m

I believe the "2.5997" was intentional, or at least I thought it was when reading it. At first I thought it was a typo, but Randall calls that number "Scientist ''trying'' to avoid rounding up" which makes me think Randall intentionally made that "mistake" as if the scientist had accidentally forgotten the first two digits (25) and used the remainder of the number (259974...), rounding it to "2.5997x10^13" [[User:Kirypto|Kirypto]] ([[User talk:Kirypto|talk]]) 23:03, 12 June 2020 (UTC)

As a (not so?) old British person, I approve. Let the Trillions come around later, when it's ''worth'' increasing the prefix to "level 3". Don't waste them on the more petty numbers. [[Special:Contributions/162.158.155.122|162.158.155.122]] 23:13, 12 June 2020 (UTC)

== "Engineering" notation omitted? ==

I find it somewhat strange that Randall doesn't offer '''25e12''' or any of those variants ('''25.259...*10^12'''). I feel like a lot of "non-normal" people would map billion to E12 instead of requiring a single digit to the left of the decimal point. shrug [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 23:09, 12 June 2020 (UTC)

==Actual scientist: ==
"What's an inch?" [[Special:Contributions/162.158.62.119|162.158.62.119]] 23:18, 12 June 2020 (UTC)
: The imaginary nano-scale multiple of the speed of light times Planck's constant. Which, dimensionally, would seem to be kg.m³/s²? [[Special:Contributions/162.158.154.73|162.158.154.73]] 00:15, 13 June 2020 (UTC)

As an article pointed out to me the other day that seemed obvious after it was said it's a non tarrif trade barrier used as American protectionism that doesn't get tarrifed back

Talk:2319: Large Number Formats

2020-06-13T01:51:10Z

172.68.255.14:

== Scientist avoiding rounding ==

Would love an explanation of the scientist avoiding rounding one. Would make sense to me with 2.525997..., but as 2.5997... I'm at a loss!

Truncating the number just before a digit less than 5 so that the final digit is not rounded up. (I do this all the time, and, I am a scientist.)

(The above was posted (anonymously?) seconds before I could get mine in, so here it is in the original format.)

This is probably completely irrelevant but it seems Randall made a small typo when trying to show a "Scientest trying to avoid rounding up."
I assume it should be 2.525997*10^13. It seems he left out a 5 and a 2 and I say such because whether he forgot the 52 or 25 is up for debate.

Relevant screenshot: [[https://i.imgur.com/NrvOivy.png]]

Also, if I'm just being completely daft and am missing something completely, please feel free to criticize me harshly and I'll go back to my little hideyhole. [[Special:Contributions/108.162.237.24|108.162.237.24]] 22:21, 12 June 2020 (UTC)

In reality, a scientist would probably say 6.416*10^13 cm. (Although possible counterpoint, this comic is really about the ''number'' 25,259,974,097,204, not the distance 25,259,974,097,204 inches.) [[Special:Contributions/172.69.33.207|172.69.33.207]] 22:47, 12 June 2020 (UTC)
Centimetres are not an SI unit. it would be 6.416*10^11 m

I believe the "2.5997" was intentional, or at least I thought it was when reading it. At first I thought it was a typo, but Randall calls that number "Scientist ''trying'' to avoid rounding up" which makes me think Randall intentionally made that "mistake" as if the scientist had accidentally forgotten the first two digits (25) and used the remainder of the number (259974...), rounding it to "2.5997x10^13" [[User:Kirypto|Kirypto]] ([[User talk:Kirypto|talk]]) 23:03, 12 June 2020 (UTC)

As a (not so?) old British person, I approve. Let the Trillions come around later, when it's ''worth'' increasing the prefix to "level 3". Don't waste them on the more petty numbers. [[Special:Contributions/162.158.155.122|162.158.155.122]] 23:13, 12 June 2020 (UTC)

== "Engineering" notation omitted? ==

I find it somewhat strange that Randall doesn't offer '''25e12''' or any of those variants ('''25.259...*10^12'''). I feel like a lot of "non-normal" people would map billion to E12 instead of requiring a single digit to the left of the decimal point. shrug [[User:JohnHawkinson|JohnHawkinson]] ([[User talk:JohnHawkinson|talk]]) 23:09, 12 June 2020 (UTC)

==Actual scientist: ==
"What's an inch?" [[Special:Contributions/162.158.62.119|162.158.62.119]] 23:18, 12 June 2020 (UTC)
: The imaginary nano-scale multiple of the speed of light times Planck's constant. Which, dimensionally, would seem to be kg.m³/s²? [[Special:Contributions/162.158.154.73|162.158.154.73]] 00:15, 13 June 2020 (UTC)

As an article pointed out to me the other day that seemed obvious after it was said it's a non tarrif trade barrier used as American protectionism that doesn't get tarrifed back

Disappearing Sunday Update

2019-08-06T13:16:04Z

172.68.255.14: /* Explanation */ Wikipedia link for Wayback Archive

{{comic
| date = August 4, 2019
| title = Disappearing Sunday Update
| image = disappearing_sunday_update.png
| titletext = This comic won't exist in the archives. NOTHING IS REAL.
| ldomain = web.archive.org/web/20190804230254/https://www
| lappend = #
}}

==Explanation==
{{incomplete|Created by UNUSUAL MEANS. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
The comic is a special Disappearing comic that was placed between the Friday comic [[2184: Unpopular Opinions]] but before the normal Monday comic update, which became [[2185: Cumulonimbus]].

It was, of course, released on [[:Category:Sunday comics|a Sunday]] (August 4th), becoming only the fifth comic to be released on a Sunday.

It is the first comic that was fully deleted from the xkcd archives, as it was replaced by the normal Monday update, leaving no trails on xkcd, but lots of trails in many other sites, like this one and in the [http://web.archive.org/web/20190804230254/https://www.xkcd.com/#/ Internet Archive] of the {{w|Wayback Machine}}. Also the [https://imgs.xkcd.com/comics/disappearing_sunday_update.png image] was still on the xkcd image server after it had disappeared.

The entire comic is an advertisement for [[Randall|Randall's]] upcoming book "[[How To]]".

The entire comic was a link directly to https://xkcd.com/how-to/. This link was also mentioned in the text of the comic. But as Randall has never learned to make different part of an image into a link the other link mentioned in the text, to his [[Blag]] was not linked from the comic. The link to this is https://blog.xkcd.com/. When this comic was released the top blog post was the one about the ''How To'' book.

The first part of the comic, the advertisement, included a drawing of the cover, two sets of pages, showing the open book, and a sampling of the table of contents of the book. The full table of contest can be found in the Blag post mentioned above.

The second part of the comic, the joke, shows Randall (as [[Cueball]]) at the bottom where he in advance apologized for the various bots, that automatically catalog xkcd comics, which might break because of this special comic. See more under [[#Unusual Means|Unusual Means]].

This ''Explain xkcd'' website is one example of such a page, where the bot that creates new pages, was assigning the comic a number of 2185 despite the comic not having a designated number at the time it was released.

The comic even broke the xkcd site itself as the previously released Friday comic, [[2184: Unpopular Opinions]], then had a next button that linked to comic 2185, which did not exist at time of release! So using that button from comic 2184 displayed a [[404]] error. Later this was fixed by giving this comic the number 2185, although only temporarily, see the [[#Trivia|Trivia]] section. At this time it was thus also included in the archive, see below regarding the title text.

In the title text it is stated that: ''This comic won't exist in the archives. NOTHING IS REAL.''. However, as shown in the [[#Trivia|Trivia]] section, Randall had so many problems with his plans for this comic, that he ended up making it a normal numbered comic and thus also put it into the archives, ensuring that the title texts statement was not real. But when the normal Monday comic was released it was removed from the xkcd site, and the archive. But then so was this title text, so for most of the time it was available, it was not true!

One of the bot methods mentioned may be in reference to the recent comic [[2180: Spreadsheets]], where [[Cueball]] debates making a real program to do a task, or to use a Google spreadsheet instead.

==Unusual Means==
Randall notes that ''if you read xkcd through unusual means... ... I hope this ephemeral ghost comic doesn't break them too badly''

Between the dots he suggested different methods of reading xkcd, other than on the {{xkcd}} home page. These methods get progressively sillier (many still need explanations). Here is a list:

; Apps
: The Android app [https://play.google.com/store/apps/details?id=de.tap.easy_xkcd easyxkcd] was broken by this comic when used in offline mode, as reported [https://github.com/tom-anders/Easy_xkcd/issues/162 here].
; Custom screen-scraping systems
: See https://en.wikipedia.org/wiki/Data_scraping#Screen_scraping
; Google Reader clones
: [https://en.wikipedia.org/wiki/Google_Reader Google Reader] was an RSS/Atom aggregator that Google discontinued in 2013. Enthusiasts created a full-featured work-alike replacement, called [https://theoldreader.com/ The Old Reader.]
; Twitter bots
: Automated posting to [https://twitter.com/ Twitter]
; BASH scripts
: A popular Un*x shell; one might, say, write a script in it to run on one's personal Un*x machine, checking for a new xkcd comic and displaying it somewhere
; Gopher portals
: [https://www.minnpost.com/business/2016/08/rise-and-fall-gopher-protocol/ Gopher] was a method of surfing the Internet that predated the Web (by about five months) and was vastly more popular (for about three years)
; Lynx-based ASCII art browsers
: [https://en.wikipedia.org/wiki/Lynx_%28web_browser%29 Lynx] is a text-based Web browser. It can launch external programs to view images, but Randall is suggesting that instead a Lynx variant might convert images to [https://www.asciiart.eu/ ASCII art], which renders images using the 94 visible ASCII keyboard characters
; Third-party Second Life feeds
: [https://secondlife.com/ Second Life] is a virtual world that opened in 2002 and has [http://www.gridsurvey.com/charts/historicalconcurrency.png averaged about 40,000 simultaneous users for the past five years.]
; RFC 2549
: An RFC is a proposal for how to run the Internet. [https://tools.ietf.org/html/rfc2549 RFC 2549] is about transmitting data using carrier pigeons (this was one of the earliest [https://en.wikipedia.org/wiki/April_Fools%27_Day April Fools' Day] RFCs).
; Massive Google docs sheets
: See #[[2180]].

Another unusual method is [http://uni.xkcd.com/ UNIXkcd], which was reported here to have broken, but was later working.

==Transcript==
:[Heading:]
:~Special Disappearing Sunday comic~

:[Below the header to the right are the following text:]
:I'm posting this ephemeral Sunday update to let you know that I wrote a book! It's a guide to solving everyday problems in terrible ways using science.
:It comes out next month, and it's available for preorder now.

:[Below this text is an arrow to an image of the book to the left. The arrow comes from this text:]
:The cover looks like this

:[The book is shown to the left as a black rectangle with large blue text and smaller white text. On the book cover, in white drawings, are seen Ponytail with a ladder and either Black or White Hat (hard to say on black background). Both are looking up on Cueball who is floating in the air with a quadcopter beneath either leg, trying to plug in an electric light bulb in a naked lamp hanging down near him. It seems he has already removed the broken light bulb, as he has one in both hands. And now he tries to put in the new one. He could have let Ponytail use the ladder...]
:[The header in blue above it all:] How To.
:[Sub header in white to the left of Cueball:] Absurd Scientific Answers to Common Real-world Problems
:[Author name in blue below the drawing:] Randall Munroe
:[Sub header to this below in white:] Creator of xkcd
:[Sub header to this below in white:] Author of ''what if?'' and ''Thing Explainer''

:[Below the text with the arrow to the book is the following text with an arrow pointing down to an image of two pages in the open book, shown to the right:]
:And the inside looks like this.

:[To the left of the open book are the following text:]
:Chapters include:
:'''How to charge your phone'''
:'''How to throw a pool party'''
:'''How to move'''
:'''How to build a lava moat'''
:'''How to ski'''

:[The open book to the right has almost only unreadable text. The left page shows a drawing of car in front of a trailer which is loaded with about 15 of boxes in four layers. Two stick figures are standing between the car and the trailer, talking with each other. The trailer is not attached to the car. There are some lines of text beneath the drawing and then what appears to be a chapter heading. It probably says something as "How to move", as this is mentioned as a chapter in the text to the left of these pages, but there one of two more unreadable words at the end of that heading. Beneath that the rest of the page is text and at the bottom there seems to be a footnote. The right page shows a house that seems to be floating a couple of meters above the ground, two arrows pointing up to the bottom of the house on either side. A stick figure stands to the left of the house which float at the figures head height. There is text beneath this drawing. Beneath that there is another drawing of a house towed on a truck, which speeds up a steep hill and jumps over a cliff to get to the other side. Seems like it will work. The speed of the truck seems to be very high as indicated by two curly lines indicating exhaust from the truck. It becomes three small clouds further behind the moving house. There is a footnote beneath the drawing. The driver of the truck yells as the truck jumps. This can actually be read:]
:Driver: ''Woooooo''

:[Beneath the above text and pages are another image of the open book with two other pages. This time to the left. This time there is text to the right.]

:[These book pages are also mainly unreadable. At the top of the left page is a drawing of what could be a lake. Two people seems to be standing out in the water, only heads showing above the water. A sign is standing on the brink, is may say "Sorry"? Behind the lake is some mountains in the background. Beneath the drawing is some text of, then a smaller diagram like drawing which may show some black clouds above and below a line in the middle of this drawing. One of the clouds are beneath a curly bracket which are beneath the line. The curly bracket lies down and has the same length as the cloud. Beneath this drawing is more text and then a third drawing at the bottom. Here is shown a cross section of the lake. At the left side of the lake the water is shallow and a stick figure is standing in the water on the bottom, head above water with its arms held up in the air. It is directing its attention to the four stick figure standing on the brink to the left looking at the figure in the water. To the right the lake becomes more than three times as deep. Clouds are above the lake, one large just right of the stick figure and one smaller further right. At the right edge the lakes edge is vertical. On the brink is what may be a diving board protruding over the lake. Something is lying on top of the board. And above is what seems to be another cloud. To the right of the lake is a pile of earth with what appears to be a large black Nuclear bomb (with the nuclear icon on it) stuck with its tip in the pile. On the right page is a line coming down from the top, which then turns to the right ending in an arrow. There is a line of text above the horizontal part of the line. The arrow points to a large heading in two rows. (See below). Beneath the heading are a few lines of text. Then a drawing of a torn map (like an old treasure map whit a X at the end of a trail marked with dots. Mountains indicated with small "^" and coast line is visible. There seems to be text beneath the X. There are text beneath the drawing. Beneath that are a header with a line beneath it, and then text beneath the line.]
:How to Dig a Hole

:[To the right of these pages are the following text:]
:You can learn more and preorder it at '''xkcd.com/how-to'''
:And read an excerpt at '''blog.xkcd.com'''

:[Beneath all this Randall (drawn as Cueball) is telling about the problem this disappearing comic may cause:]
:Randall: If you read xkcd through unusual means, including apps, custom screen-scraping systems, Google reader clones, Twitter bots, bash scripts, gopher portals, lynx-based ASCII art browsers, third-party Second Life feeds, RFC 2549, or massive google docs sheets full of =IMPORTHTML() and =IMAGE() formulas, I hope this ephemeral ghost comic doesn't break them too badly.
:Randall: It will disappear with the normal Monday update.
:Randall: (At least, I think it will. I've never tried this before. So I'm honestly not sure what the server will do.)

==Trivia==
*This August 4th 2019 [[:Category:Sunday comics|Sunday comic]] was first posted on the front page without any number relating to it. Thus breaking the next comic button on xkcd.
**Since it was scheduled to be deleted on Monday August 5th 2019, when the next comic arrives on xkcd, it was not supposed to have a number or be in the archive. But seems like this caused too many problems for the xkcd site it self (not just for all the other sites Randall jokes about).
**So later it was given the next number in the comic list (2185) and was also included in the archive for the duration of its stay on the xkcd front page.
**It was later removed from the archive and 2185 was assigned to the Monday comic [[2185: Cumulonimbus]].
*Here are some pictures documenting that the comic at some point between release and the next comics release worked like a normal comic with number 2185 as shown in the web address at the top.
*[[File:Disappearing Sunday Update with number 2185.png]]
*It was also part of the archive with the release date showing corectly when hovering over the title:
*[[File:Archive with Disappearing Sunday Update and date.png]]

{{comic discussion}}

[[Category:Extra comics]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Randall Munroe]]

Disappearing Sunday Update

2019-08-06T13:15:02Z

172.68.255.14: /* Explanation */ test

{{comic
| date = August 4, 2019
| title = Disappearing Sunday Update
| image = disappearing_sunday_update.png
| titletext = This comic won't exist in the archives. NOTHING IS REAL.
| ldomain = web.archive.org/web/20190804230254/https://www
| lappend = #
}}

==Explanation==
{{incomplete|Created by UNUSUAL MEANS. Please mention here why this explanation isn't complete. Do NOT delete this tag too soon.}}
The comic is a special Disappearing comic that was placed between the Friday comic [[2184: Unpopular Opinions]] but before the normal Monday comic update, which became [[2185: Cumulonimbus]].

It was, of course, released on [[:Category:Sunday comics|a Sunday]] (August 4th), becoming only the fifth comic to be released on a Sunday.

It is the first comic that was fully deleted from the xkcd archives, as it was replaced by the normal Monday update, leaving no trails on xkcd, but lots of trails in many other sites, like this one and in the [http://web.archive.org/web/20190804230254/https://www.xkcd.com/#/ Internet Archive] of the [[Wayback Machine]]. Also the [https://imgs.xkcd.com/comics/disappearing_sunday_update.png image] was still on the xkcd image server after it had disappeared.

The entire comic is an advertisement for [[Randall|Randall's]] upcoming book "[[How To]]".

The entire comic was a link directly to https://xkcd.com/how-to/. This link was also mentioned in the text of the comic. But as Randall has never learned to make different part of an image into a link the other link mentioned in the text, to his [[Blag]] was not linked from the comic. The link to this is https://blog.xkcd.com/. When this comic was released the top blog post was the one about the ''How To'' book.

The first part of the comic, the advertisement, included a drawing of the cover, two sets of pages, showing the open book, and a sampling of the table of contents of the book. The full table of contest can be found in the Blag post mentioned above.

The second part of the comic, the joke, shows Randall (as [[Cueball]]) at the bottom where he in advance apologized for the various bots, that automatically catalog xkcd comics, which might break because of this special comic. See more under [[#Unusual Means|Unusual Means]].

This ''Explain xkcd'' website is one example of such a page, where the bot that creates new pages, was assigning the comic a number of 2185 despite the comic not having a designated number at the time it was released.

The comic even broke the xkcd site itself as the previously released Friday comic, [[2184: Unpopular Opinions]], then had a next button that linked to comic 2185, which did not exist at time of release! So using that button from comic 2184 displayed a [[404]] error. Later this was fixed by giving this comic the number 2185, although only temporarily, see the [[#Trivia|Trivia]] section. At this time it was thus also included in the archive, see below regarding the title text.

In the title text it is stated that: ''This comic won't exist in the archives. NOTHING IS REAL.''. However, as shown in the [[#Trivia|Trivia]] section, Randall had so many problems with his plans for this comic, that he ended up making it a normal numbered comic and thus also put it into the archives, ensuring that the title texts statement was not real. But when the normal Monday comic was released it was removed from the xkcd site, and the archive. But then so was this title text, so for most of the time it was available, it was not true!

One of the bot methods mentioned may be in reference to the recent comic [[2180: Spreadsheets]], where [[Cueball]] debates making a real program to do a task, or to use a Google spreadsheet instead.

==Unusual Means==
Randall notes that ''if you read xkcd through unusual means... ... I hope this ephemeral ghost comic doesn't break them too badly''

Between the dots he suggested different methods of reading xkcd, other than on the {{xkcd}} home page. These methods get progressively sillier (many still need explanations). Here is a list:

; Apps
: The Android app [https://play.google.com/store/apps/details?id=de.tap.easy_xkcd easyxkcd] was broken by this comic when used in offline mode, as reported [https://github.com/tom-anders/Easy_xkcd/issues/162 here].
; Custom screen-scraping systems
: See https://en.wikipedia.org/wiki/Data_scraping#Screen_scraping
; Google Reader clones
: [https://en.wikipedia.org/wiki/Google_Reader Google Reader] was an RSS/Atom aggregator that Google discontinued in 2013. Enthusiasts created a full-featured work-alike replacement, called [https://theoldreader.com/ The Old Reader.]
; Twitter bots
: Automated posting to [https://twitter.com/ Twitter]
; BASH scripts
: A popular Un*x shell; one might, say, write a script in it to run on one's personal Un*x machine, checking for a new xkcd comic and displaying it somewhere
; Gopher portals
: [https://www.minnpost.com/business/2016/08/rise-and-fall-gopher-protocol/ Gopher] was a method of surfing the Internet that predated the Web (by about five months) and was vastly more popular (for about three years)
; Lynx-based ASCII art browsers
: [https://en.wikipedia.org/wiki/Lynx_%28web_browser%29 Lynx] is a text-based Web browser. It can launch external programs to view images, but Randall is suggesting that instead a Lynx variant might convert images to [https://www.asciiart.eu/ ASCII art], which renders images using the 94 visible ASCII keyboard characters
; Third-party Second Life feeds
: [https://secondlife.com/ Second Life] is a virtual world that opened in 2002 and has [http://www.gridsurvey.com/charts/historicalconcurrency.png averaged about 40,000 simultaneous users for the past five years.]
; RFC 2549
: An RFC is a proposal for how to run the Internet. [https://tools.ietf.org/html/rfc2549 RFC 2549] is about transmitting data using carrier pigeons (this was one of the earliest [https://en.wikipedia.org/wiki/April_Fools%27_Day April Fools' Day] RFCs).
; Massive Google docs sheets
: See #[[2180]].

Another unusual method is [http://uni.xkcd.com/ UNIXkcd], which was reported here to have broken, but was later working.

==Transcript==
:[Heading:]
:~Special Disappearing Sunday comic~

:[Below the header to the right are the following text:]
:I'm posting this ephemeral Sunday update to let you know that I wrote a book! It's a guide to solving everyday problems in terrible ways using science.
:It comes out next month, and it's available for preorder now.

:[Below this text is an arrow to an image of the book to the left. The arrow comes from this text:]
:The cover looks like this

:[The book is shown to the left as a black rectangle with large blue text and smaller white text. On the book cover, in white drawings, are seen Ponytail with a ladder and either Black or White Hat (hard to say on black background). Both are looking up on Cueball who is floating in the air with a quadcopter beneath either leg, trying to plug in an electric light bulb in a naked lamp hanging down near him. It seems he has already removed the broken light bulb, as he has one in both hands. And now he tries to put in the new one. He could have let Ponytail use the ladder...]
:[The header in blue above it all:] How To.
:[Sub header in white to the left of Cueball:] Absurd Scientific Answers to Common Real-world Problems
:[Author name in blue below the drawing:] Randall Munroe
:[Sub header to this below in white:] Creator of xkcd
:[Sub header to this below in white:] Author of ''what if?'' and ''Thing Explainer''

:[Below the text with the arrow to the book is the following text with an arrow pointing down to an image of two pages in the open book, shown to the right:]
:And the inside looks like this.

:[To the left of the open book are the following text:]
:Chapters include:
:'''How to charge your phone'''
:'''How to throw a pool party'''
:'''How to move'''
:'''How to build a lava moat'''
:'''How to ski'''

:[The open book to the right has almost only unreadable text. The left page shows a drawing of car in front of a trailer which is loaded with about 15 of boxes in four layers. Two stick figures are standing between the car and the trailer, talking with each other. The trailer is not attached to the car. There are some lines of text beneath the drawing and then what appears to be a chapter heading. It probably says something as "How to move", as this is mentioned as a chapter in the text to the left of these pages, but there one of two more unreadable words at the end of that heading. Beneath that the rest of the page is text and at the bottom there seems to be a footnote. The right page shows a house that seems to be floating a couple of meters above the ground, two arrows pointing up to the bottom of the house on either side. A stick figure stands to the left of the house which float at the figures head height. There is text beneath this drawing. Beneath that there is another drawing of a house towed on a truck, which speeds up a steep hill and jumps over a cliff to get to the other side. Seems like it will work. The speed of the truck seems to be very high as indicated by two curly lines indicating exhaust from the truck. It becomes three small clouds further behind the moving house. There is a footnote beneath the drawing. The driver of the truck yells as the truck jumps. This can actually be read:]
:Driver: ''Woooooo''

:[Beneath the above text and pages are another image of the open book with two other pages. This time to the left. This time there is text to the right.]

:[These book pages are also mainly unreadable. At the top of the left page is a drawing of what could be a lake. Two people seems to be standing out in the water, only heads showing above the water. A sign is standing on the brink, is may say "Sorry"? Behind the lake is some mountains in the background. Beneath the drawing is some text of, then a smaller diagram like drawing which may show some black clouds above and below a line in the middle of this drawing. One of the clouds are beneath a curly bracket which are beneath the line. The curly bracket lies down and has the same length as the cloud. Beneath this drawing is more text and then a third drawing at the bottom. Here is shown a cross section of the lake. At the left side of the lake the water is shallow and a stick figure is standing in the water on the bottom, head above water with its arms held up in the air. It is directing its attention to the four stick figure standing on the brink to the left looking at the figure in the water. To the right the lake becomes more than three times as deep. Clouds are above the lake, one large just right of the stick figure and one smaller further right. At the right edge the lakes edge is vertical. On the brink is what may be a diving board protruding over the lake. Something is lying on top of the board. And above is what seems to be another cloud. To the right of the lake is a pile of earth with what appears to be a large black Nuclear bomb (with the nuclear icon on it) stuck with its tip in the pile. On the right page is a line coming down from the top, which then turns to the right ending in an arrow. There is a line of text above the horizontal part of the line. The arrow points to a large heading in two rows. (See below). Beneath the heading are a few lines of text. Then a drawing of a torn map (like an old treasure map whit a X at the end of a trail marked with dots. Mountains indicated with small "^" and coast line is visible. There seems to be text beneath the X. There are text beneath the drawing. Beneath that are a header with a line beneath it, and then text beneath the line.]
:How to Dig a Hole

:[To the right of these pages are the following text:]
:You can learn more and preorder it at '''xkcd.com/how-to'''
:And read an excerpt at '''blog.xkcd.com'''

:[Beneath all this Randall (drawn as Cueball) is telling about the problem this disappearing comic may cause:]
:Randall: If you read xkcd through unusual means, including apps, custom screen-scraping systems, Google reader clones, Twitter bots, bash scripts, gopher portals, lynx-based ASCII art browsers, third-party Second Life feeds, RFC 2549, or massive google docs sheets full of =IMPORTHTML() and =IMAGE() formulas, I hope this ephemeral ghost comic doesn't break them too badly.
:Randall: It will disappear with the normal Monday update.
:Randall: (At least, I think it will. I've never tried this before. So I'm honestly not sure what the server will do.)

==Trivia==
*This August 4th 2019 [[:Category:Sunday comics|Sunday comic]] was first posted on the front page without any number relating to it. Thus breaking the next comic button on xkcd.
**Since it was scheduled to be deleted on Monday August 5th 2019, when the next comic arrives on xkcd, it was not supposed to have a number or be in the archive. But seems like this caused too many problems for the xkcd site it self (not just for all the other sites Randall jokes about).
**So later it was given the next number in the comic list (2185) and was also included in the archive for the duration of its stay on the xkcd front page.
**It was later removed from the archive and 2185 was assigned to the Monday comic [[2185: Cumulonimbus]].
*Here are some pictures documenting that the comic at some point between release and the next comics release worked like a normal comic with number 2185 as shown in the web address at the top.
*[[File:Disappearing Sunday Update with number 2185.png]]
*It was also part of the archive with the release date showing corectly when hovering over the title:
*[[File:Archive with Disappearing Sunday Update and date.png]]

{{comic discussion}}

[[Category:Extra comics]]
[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Megan]]
[[Category:Comics featuring White Hat]]
[[Category:Comics featuring Randall Munroe]]

Talk:2176: How Hacking Works

2019-07-20T14:00:28Z

172.68.255.14:

any idea what the title text is referring to? some smash mouth lyrics, maybe? [[User:Gir|-- //gir.st/]] ([[User talk:Gir|talk]]) 13:48, 15 July 2019 (UTC)
:The first line of their most popular song, All Star, is "Somebody once told me the world is gonna roll me". [[Special:Contributions/162.158.123.97|162.158.123.97]] 13:55, 15 July 2019 (UTC)
::welp, i could have figured that out! to my defense, ducking "roll them like this" only brought up the comic itself. Thanks! [[User:Gir|-- //gir.st/]] ([[User talk:Gir|talk]]) 14:06, 15 July 2019 (UTC)
: I think Randall is referring to this https://xkcd.com/792/ with himself is the "someone" who warned them. [[Special:Contributions/172.68.142.239|172.68.142.239]] 14:20, 15 July 2019 (UTC)
::I doubt that the title text was a reference to this comic, but I've linked to it in the section about the second panel. Thanks! [[User:Gir|-- //gir.st/]] ([[User talk:Gir|talk]]) 14:28, 15 July 2019 (UTC)
I always (not really) thought hacking was more like "My latest scan of the internet found a computer that hasn't updated it's OS or it's antivirus in two months!" "Score! Hack in and steal their money!" [[Special:Contributions/172.68.90.76|172.68.90.76]] 14:56, 15 July 2019 (UTC)SiliconWolf
:Usually, the scan immediately installs some virus. Noone is going to manually hacks thousands of machines. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:43, 15 July 2019 (UTC)

Note that you can sort of get the best of both words if, instead of using just common password or just password written on paper, you use password combined from those two. Online hackers wouldn't be able to hack your other accounts because all accounts have different password, while family members wouldn't be able to hack anything because they wouldn't know the common prefix to those passwords written on paper. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:43, 15 July 2019 (UTC)
:Nah... I just need to 1) obtain a list of leaked passwords, 2) break into your pad/cubicle to obtain your dead-tree-list of partial passwords, 3) successfully identify the fully expanded one in the former that is the superset of the appropriate partial in the latter, 4) thusly derive the likely transformation you used, 5) apply that to all the other partials to easily h4ck 4ll ov UR 07|-|3|2 |_°9!|\|5 !!!111!!11oneoneone ...6) Profit? [[Special:Contributions/162.158.34.172|162.158.34.172]] 00:09, 16 July 2019 (UTC)
::Or just drug you and beat you with a wrench until you give up the passwords [[Special:Contributions/172.68.255.14|172.68.255.14]] 13:59, 20 July 2019 (UTC)

I'm disappointed that the template at the top want authored by "The Sharpest Tool in the Shed." [[User:Mootstrap|Mootstrap]] ([[User talk:Mootstrap|talk]]) 02:39, 16 July 2019 (UTC)

Anyone has idea why Randall keeps ignoring existence of password managers? [[Special:Contributions/162.158.103.147|162.158.103.147]] 07:31, 16 July 2019 (UTC)

I have to say, I'm not aware of anyone who thinks hacking is as Randall describes. I would have thought that most people would mistakenly think hacking is about typing complex green code onto a screen until a message pops up saying "ACCESS GRANTED". [[User:Hawthorn|Hawthorn]] ([[User talk:Hawthorn|talk]]) 12:23, 16 July 2019 (UTC)
:Well, some people put a lot of emphasis of never to write a password down, to prevent insider attacks. This leads to people reusing passwords, which leads to the much bigger risk as displayed here. So this comic is in line with [[936: Password Strength]] to keep superstition out of password policies and the attached mindsets of users. (Especially the combination of using long complex passwords, as in 936, and to never write them down would lead people to reuse them a lot.). Randall here mocks, that insider threats are only a threat with insiders (family, friends, coworkers, etc. unless you work (or use your device) in a public place, while the much bigger threat for everyone is anonymous hackers going for quantity. --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 13:43, 16 July 2019 (UTC)

I have removed the claim that "Most crimes are committed by people known to their victims, [...]". This might be true for crimes committed in the real world, but I doubt that's true for "cybercrimes" (Urgh. That term!). Please do re-add it if you have a credible source for it! ;-) [[Special:Contributions/172.68.50.36|172.68.50.36]] 16:15, 16 July 2019 (UTC)

There are Smash Mouth message boards? [[User:Youforgotthisthing|Youforgotthisthing]] ([[User talk:Youforgotthisthing|talk]]) 16:28, 16 July 2019 (UTC)

First panel: Where's the fourth Teenage Mutant Ninja Turtle??[[Special:Contributions/162.158.214.82|162.158.214.82]] 11:09, 17 July 2019 (UTC)
:He's picking up pizza for the crew! [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 12:25, 17 July 2019 (UTC)

Talk:2176: How Hacking Works

2019-07-20T13:59:39Z

172.68.255.14:

any idea what the title text is referring to? some smash mouth lyrics, maybe? [[User:Gir|-- //gir.st/]] ([[User talk:Gir|talk]]) 13:48, 15 July 2019 (UTC)
:The first line of their most popular song, All Star, is "Somebody once told me the world is gonna roll me". [[Special:Contributions/162.158.123.97|162.158.123.97]] 13:55, 15 July 2019 (UTC)
::welp, i could have figured that out! to my defense, ducking "roll them like this" only brought up the comic itself. Thanks! [[User:Gir|-- //gir.st/]] ([[User talk:Gir|talk]]) 14:06, 15 July 2019 (UTC)
: I think Randall is referring to this https://xkcd.com/792/ with himself is the "someone" who warned them. [[Special:Contributions/172.68.142.239|172.68.142.239]] 14:20, 15 July 2019 (UTC)
::I doubt that the title text was a reference to this comic, but I've linked to it in the section about the second panel. Thanks! [[User:Gir|-- //gir.st/]] ([[User talk:Gir|talk]]) 14:28, 15 July 2019 (UTC)
I always (not really) thought hacking was more like "My latest scan of the internet found a computer that hasn't updated it's OS or it's antivirus in two months!" "Score! Hack in and steal their money!" [[Special:Contributions/172.68.90.76|172.68.90.76]] 14:56, 15 July 2019 (UTC)SiliconWolf
:Usually, the scan immediately installs some virus. Noone is going to manually hacks thousands of machines. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:43, 15 July 2019 (UTC)

Note that you can sort of get the best of both words if, instead of using just common password or just password written on paper, you use password combined from those two. Online hackers wouldn't be able to hack your other accounts because all accounts have different password, while family members wouldn't be able to hack anything because they wouldn't know the common prefix to those passwords written on paper. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:43, 15 July 2019 (UTC)
:Nah... I just need to 1) obtain a list of leaked passwords, 2) break into your pad/cubicle to obtain your dead-tree-list of partial passwords, 3) successfully identify the fully expanded one in the former that is the superset of the appropriate partial in the latter, 4) thusly derive the likely transformation you used, 5) apply that to all the other partials to easily h4ck 4ll ov UR 07|-|3|2 |_°9!|\|5 !!!111!!11oneoneone ...6) Profit? [[Special:Contributions/162.158.34.172|162.158.34.172]] 00:09, 16 July 2019 (UTC)
Or just drug you and beat you with a wrench until you give up the passwords [[Special:Contributions/172.68.255.14|172.68.255.14]] 13:59, 20 July 2019 (UTC)

I'm disappointed that the template at the top want authored by "The Sharpest Tool in the Shed." [[User:Mootstrap|Mootstrap]] ([[User talk:Mootstrap|talk]]) 02:39, 16 July 2019 (UTC)

Anyone has idea why Randall keeps ignoring existence of password managers? [[Special:Contributions/162.158.103.147|162.158.103.147]] 07:31, 16 July 2019 (UTC)

I have to say, I'm not aware of anyone who thinks hacking is as Randall describes. I would have thought that most people would mistakenly think hacking is about typing complex green code onto a screen until a message pops up saying "ACCESS GRANTED". [[User:Hawthorn|Hawthorn]] ([[User talk:Hawthorn|talk]]) 12:23, 16 July 2019 (UTC)
:Well, some people put a lot of emphasis of never to write a password down, to prevent insider attacks. This leads to people reusing passwords, which leads to the much bigger risk as displayed here. So this comic is in line with [[936: Password Strength]] to keep superstition out of password policies and the attached mindsets of users. (Especially the combination of using long complex passwords, as in 936, and to never write them down would lead people to reuse them a lot.). Randall here mocks, that insider threats are only a threat with insiders (family, friends, coworkers, etc. unless you work (or use your device) in a public place, while the much bigger threat for everyone is anonymous hackers going for quantity. --[[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) 13:43, 16 July 2019 (UTC)

I have removed the claim that "Most crimes are committed by people known to their victims, [...]". This might be true for crimes committed in the real world, but I doubt that's true for "cybercrimes" (Urgh. That term!). Please do re-add it if you have a credible source for it! ;-) [[Special:Contributions/172.68.50.36|172.68.50.36]] 16:15, 16 July 2019 (UTC)

There are Smash Mouth message boards? [[User:Youforgotthisthing|Youforgotthisthing]] ([[User talk:Youforgotthisthing|talk]]) 16:28, 16 July 2019 (UTC)

First panel: Where's the fourth Teenage Mutant Ninja Turtle??[[Special:Contributions/162.158.214.82|162.158.214.82]] 11:09, 17 July 2019 (UTC)
:He's picking up pizza for the crew! [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 12:25, 17 July 2019 (UTC)