explain xkcd - User contributions [en]

2121: Light Pollution

2019-03-11T18:04:48Z

172.69.70.227: /* Explanation */ Deleting lame joke

{{comic
| number = 2121
| date = March 8, 2019
| title = Light Pollution
| image = light_pollution.png
| titletext = It's so sad how almost no one alive today can remember seeing the galactic rainbow, the insanity nebula, or the skull and glowing eyes of the Destroyer of Sagittarius.
}}

==Explanation==
{{incomplete|Created by the DESTROYER OF SAGITTARIUS. Some answers appear possibly one-person poorly-backed opinions such as Lovecraft; any other opinions to counter them? Do NOT delete this tag too soon.}}

This comic shows how {{w|Light pollution|light pollution}} in cities affect what you can see from the night sky. The first three panels show realistic examples of what you could see from the sky inside a large city, in the suburbs and far away from light pollution. These panels roughly correlate on the {{w|Bortle Scale}} to 8-9 (city), 5-6 (suburbs) and 2-3 (remote area).

The last panel contrasts these for comedic effect with fake things in the sky that are not actually present in the night sky. "{{w|Celestial spheres|Crystal spheres}}" is an ancient theory about the heavens and what it was that held up the stars, before it was commonly accepted that space could be made of hard vacuum and celestial bodies held there by laws of inertia and gravity and vast distances. The spheres are nested inside each other concentrically. Randall proposes they are held by {{w|latticework}} like that which supports the Eiffel Tower, and that the lattice structure could be seen long ago when the sky was much darker.

Although all crystals do have a {{w|Crystal structure|crystal lattice}}, as in the [https://www.merriam-webster.com/dictionary/crystal meaning 3] of the word "crystal" in Merriam-Webster (a body that [...] has a regularly repeating internal arrangement of its atoms and often external plane faces), these lattices are sub-microscopic and would be invisible in the sky. Additionally, crystal structure was not yet known at the time that the crystal spheres theory was popular.

In consensus reality, the sky does contain many invisible objects that can observe us and/or provide major structures of our society, such as satellites, {{w|Mesosphere#Exploration_and_uses|nearcraft}}, and drones, but these are usually invisible due to size and distance more than brightness.

The title text starts off sounding like a legitimate statement about light pollution. It is common to remark that the vast majority of people never see things in the night sky that were commonly seen by our ancestors every night prior to industrialization, such as the {{w|Milky Way}} or now-obscure phenomena such as {{w|Zodiacal light}}, {{w|Airglow}} or {{w|Gegenschein}}. The title text then further adds to the humor of the last panel by describing non-existent features, many of which a reader has suggested could be references to {{w|H. P. Lovecraft}}. He often refers to beasts the possible size that “The Destroyer of Sagittarius” would have to be. He also often speaks of insanity and color, connecting the two.

{{w|Sagittarius (constellation)|Sagittarius}} is one of the constellations of the zodiac and {{w|Sagittarius A*}} a black hole at the center of the {{w|Milky Way}} inside of that constellation.

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

:[Four views of the night sky are shown among each other. The text on top reads:]
:'''Light Pollution and the Disappearing Night Sky'''

:[The first view shows only a few bright stars visible on a fairly light gray-brownish background. The inline text on the left top is:]
:High Light Pollution
:(Cities)

:[On the second view more stars are visible and some faint blurry white clouds on a dark-gray background are visible.]
:Moderate Light Pollution
:(Suburbs)

:[A lot of stars, even partly colored, and a clear image of many clouds on a dark background are shown.]
:Low Light Pollution
:(Very remote areas)

:[The last image shows the same region as above but with even more exposed stars and clouds, the colors are also more explicit. A faint lattice of triangles overlaying the image to its full extent and three ghastly silhouettes of sail-ships are shown embedded in clouds. The text on the top left reads:]
:No Light Pollution
:(How the sky should look)
:[Four arrows are pointing to some triangles:]
:Lattice of the crystal spheres
:[Three arrows are indicating the sail-ships:]
:Ships of the Sky King

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Astronomy]]

Talk:2060: Hygrometer

2018-10-17T18:29:15Z

172.69.70.227:

Interestingly, Google search for ometerometer returns porn results. If there is an xkcd comic about rule 34 (if it exists, there is porn about it), it could be linked here.--[[User:Pere prlpz|Pere prlpz]] ([[User talk:Pere prlpz|talk]]) 15:48, 17 October 2018 (UTC)
:Yeah, and now xkcd is prominently displayed. Good for you! - Who? {{unsigned ip|162.158.165.238}}
:Should have taken a screenshot: The link provided under Trivia returns no porn results whatsoever now (yes I have SafeSearch turned off). I'm pretty sure almost any search for a seldom used word or phrase returns a high number of porn results, but '''I seriously doubt''' any of the porn was actually ''about'' ometerometers, or even featured that word on the page. I think you just got unrelated results. I'm gonna have to say "citation needed" on that one, because the citation given yields no such results. [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 17:19, 17 October 2018 (UTC)

Which meters do you enjoy?
I'm a particular fan of the Crookes radiometer [[Special:Contributions/141.101.77.116|141.101.77.116]] 16:33, 17 October 2018 (UTC)
: Based almost solely on the exotic name, I'm a particular fan of the {{w|sphygmomanometer}} (blood pressure cuff), and I'm disappointed that Randall didn't take the opportunity to mention it anywhere. [[Special:Contributions/172.68.46.41|172.68.46.41]] 16:44, 17 October 2018 (UTC)
:: My laser power meter is pretty bad-assed - but the measurement tool I'm most impressed by isn't a "ometer", it's a "mechanics level" - which is basically just an incredibly accurate spirit level - it can measure a tilt angle equal to the thickness of a single sheet of paper over a distance of two meters - which is pretty astounding considering how crude it is. You can tell that you have a cool -ometer if it comes in a nice wooden box - and a seriously cool one if the box has brass hinges and is lined with velvet...it's kindof a rule for us ometerometrists. [[Special:Contributions/172.69.70.227|172.69.70.227]] 18:27, 17 October 2018 (UTC)

Here's the Rule 34 comic: https://xkcd.com/305/ {{unsigned ip|172.68.65.6}}
:Thank you. I added it to the description.--[[User:Pere prlpz|Pere prlpz]] ([[User talk:Pere prlpz|talk]]) 16:52, 17 October 2018 (UTC)

But no mention of an alethiometer. [[Special:Contributions/172.68.58.113|172.68.58.113]] 16:59, 17 October 2018 (UTC)

Let's all remember that there are some measurement devices that do not end in -ometer but rather simply in -meter, for example "multimeter", "ohmmeter", "ammeter", etc. {{unsigned ip|108.162.221.77}}
: So does a micrometer end in ometer? Tough call! [[Special:Contributions/172.69.70.227|172.69.70.227]] 18:29, 17 October 2018 (UTC)

I'm certainly not an expert on Google and how search results are generated, but I think it's at least highly likely that search results can be impacted by a user's previous searches and/or clicked results. While it might be interesting or even amusing, I don't think it's appropriate to include anything in the explanation of this comic about Rule 34 because it has absolutely nothing to do with the content of the comic itself! [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 18:12, 17 October 2018 (UTC)

Talk:2060: Hygrometer

2018-10-17T18:27:03Z

172.69.70.227:

Interestingly, Google search for ometerometer returns porn results. If there is an xkcd comic about rule 34 (if it exists, there is porn about it), it could be linked here.--[[User:Pere prlpz|Pere prlpz]] ([[User talk:Pere prlpz|talk]]) 15:48, 17 October 2018 (UTC)
:Yeah, and now xkcd is prominently displayed. Good for you! - Who? {{unsigned ip|162.158.165.238}}
:Should have taken a screenshot: The link provided under Trivia returns no porn results whatsoever now (yes I have SafeSearch turned off). I'm pretty sure almost any search for a seldom used word or phrase returns a high number of porn results, but '''I seriously doubt''' any of the porn was actually ''about'' ometerometers, or even featured that word on the page. I think you just got unrelated results. I'm gonna have to say "citation needed" on that one, because the citation given yields no such results. [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 17:19, 17 October 2018 (UTC)

Which meters do you enjoy?
I'm a particular fan of the Crookes radiometer [[Special:Contributions/141.101.77.116|141.101.77.116]] 16:33, 17 October 2018 (UTC)
: Based almost solely on the exotic name, I'm a particular fan of the {{w|sphygmomanometer}} (blood pressure cuff), and I'm disappointed that Randall didn't take the opportunity to mention it anywhere. [[Special:Contributions/172.68.46.41|172.68.46.41]] 16:44, 17 October 2018 (UTC)
:: My laser power meter is pretty bad-assed - but the measurement tool I'm most impressed by isn't a "ometer", it's a "mechanics level" - which is basically just an incredibly accurate spirit level - it can measure a tilt angle equal to the thickness of a single sheet of paper over a distance of two meters - which is pretty astounding considering how crude it is. You can tell that you have a cool -ometer if it comes in a nice wooden box - and a seriously cool one if the box has brass hinges and is lined with velvet...it's kindof a rule for us ometerometrists. [[Special:Contributions/172.69.70.227|172.69.70.227]] 18:27, 17 October 2018 (UTC)

Here's the Rule 34 comic: https://xkcd.com/305/ {{unsigned ip|172.68.65.6}}
:Thank you. I added it to the description.--[[User:Pere prlpz|Pere prlpz]] ([[User talk:Pere prlpz|talk]]) 16:52, 17 October 2018 (UTC)

But no mention of an alethiometer. [[Special:Contributions/172.68.58.113|172.68.58.113]] 16:59, 17 October 2018 (UTC)

Let's all remember that there are some measurement devices that do not end in -ometer but rather simply in -meter, for example "multimeter", "ohmmeter", "ammeter", etc. {{unsigned ip|108.162.221.77}}

I'm certainly not an expert on Google and how search results are generated, but I think it's at least highly likely that search results can be impacted by a user's previous searches and/or clicked results. While it might be interesting or even amusing, I don't think it's appropriate to include anything in the explanation of this comic about Rule 34 because it has absolutely nothing to do with the content of the comic itself! [[User:Ianrbibtitlht|Ianrbibtitlht]] ([[User talk:Ianrbibtitlht|talk]]) 18:12, 17 October 2018 (UTC)

2048: Curve-Fitting

2018-10-04T18:27:32Z

172.69.70.227: /* LOESS */ Just a minor grammar correction. "It's not much helpful" is much incorrect.

{{comic
| number = 2048
| date = September 19, 2018
| title = Curve-Fitting
| image = curve_fitting.png
| titletext = Cauchy-Lorentz: "Something alarmingly mathematical is happening, and you should probably pause to Google my name and check what field I originally worked in."
}}

==Explanation==

An illustration of several plots of the same data with {{w|Curve fitting|curves fitted}} to the points, paired with conclusions that you might draw about the person who made them. These data, when plotted on an X/Y graph, appear to have a general upward trend, but the data is far too noisy, with too few data points, to clearly suggest any specific growth pattern. In such a case, many different mathematical and statistical models ''could'' be presented as roughly fitting the data, but none of them fits well enough to compellingly represent the data.

When modeling such a problem statistically, much of the work of a data scientist or statistician is knowing which fitting method is most appropriate for the data in question. Here we see various hypothetical scientists or statisticians each applying their own interpretations to the exact same data, and the comic mocks each of them for their various personal biases or other assorted excuses. In general, the researcher will specify the form of an equation for the line to be drawn, and an algorithm will produce the actual line.

Nonetheless scientists work much more seriously on the reliability of their assumptions by giving a value for the {{w|Standard deviation|standard deviation}} represented by the Greek letter sigma σ or the Latin letter s as a measure to quantify the amount of variation of the data points against the presented ''best fit''. If the σ-value isn't good enough an interpretation based on a specific fit wouldn't be accepted by the science community.

Since [[Randall]] gives no hint about the nature of the used data set - same in each graph - any fitting presented doesn't make any sense. The graphs could represent a star map, the votes for the latest elected presidents, or your recent invoices on power consumption. This comic just exaggerates various methods on interpreting data, but without the knowledge of the matter in the background nothing makes any sense.

===Linear===
[[File:Anscombe's quartet 3.svg|thumb|200px|Different data sets result in the same regression.]]
<math>f(x) = mx + b</math>

{{w|Linear regression}} is the most basic form of regression; it tries to find the straight line that best approximates the data. As it's the simplest, most widely taught form of regression, and in general derivable function are locally well approximated by a straight line, it's usually the first and most trivial attempt of fit.

The picture to the right shows how totally different data sets can result into the same line. It's obvious that some more basics about the nature of the data must be used to understand if this simple line really does make sense.

The comment below the graph ''"Hey, I did a regression."'' refers to the fact that this is just the easiest way of fitting data into a curve.

===Quadratic===
<math>f(x) = ax^2 + bx + c</math>

{{w|Polynomial regression|Quadratic fit}} (i.e. fitting a parabola through the data) is the lowest grade polynomial that can be used to fit data through a curved line; if the data exhibits clearly "curved" behavior (or if the experimenter feels that its growth should be more than linear), a parabola is often the first, easiest, stab at fitting the data.

The comment below the graph ''"I wanted a curved line, so I made one with math."'' suggests that a quadratic regression is used when straight lines no longer satisfy the researcher, but he still wants to use simple math expression. Quadratic correlations like this are mathematically valid and one of the simplest kind of curve in math, but this curve doesn't appear to satisfy the data any better than does simple, linear regression.

===Logarithmic===
[[File:Logarithm_plots.png|thumb|200px|Common logarithm functions.]]
<math>f(x) = a\log_b(x) + c</math>

A {{w|Logarithm|logarithmic}} curve growths slower on higher values, but still grows without bound to infinity rather than approaching a horizontal {{w|asymptote}}. The small ''b'' in the formula represents the base which is in most cases ''{{w|e (mathematical constant)|e}}'', 10, or 2. If the data presumably does approach a horizontal asymptote then this fit isn't an effective method to explain the nature of the data.

The comment below the graph ''"Look, it's tapering off!"'' builds up the impression that the data diminishes while under this fit it's still growing to infinity, only much slower than a linear regression does.

===Exponential===
[[File:Exponential.svg|thumb|200px|Exponential growth (green) compared to other functions.]]
<math>f(x) = a\cdot b^x + c</math>

An {{w|Exponential growth|exponential curve}}, on the contrary, is typical of a phenomenon whose growth gets rapidly faster and faster - a common case is a process that generates stuff that contributes to the process itself, think bacteria growth or compound interest.

The logarithmic and exponential interpretations could very easily be fudged or engineered by a researcher with an agenda (such as by taking a misleading subset or even outright lying about the regression), which the comic mocks by juxtaposing them side-by-side on the same set of data.

The comment below the graph ''"Look, it's growing uncontrollably!"'' gives an other frivolous statement suggesting something like chaos. Also this even faster growth is well defined and has no asymptote at both axes.

===LOESS===
A {{w|Local regression|LOESS fit}} doesn't use a single formula to fit all the data, but approximates data points locally using different polynomials for each "zone" (weighting differently data points as they get further from it) and patching them together. As it has much more degrees of freedom compared to a single polynomial, it generally "fits better" to any data set, although it is generally impossible to derive any strong, "clean" mathematical correlation from it - it is just a nice smooth line that approximates well the data points, with a good degree of rejection from outliers.

The comment below the graph ''"I'm sophisticated, not like those bumbling polynomial people."'' emphasis this more complicated interpretation but without a simple mathematical description it's not very helpful to find academic descriptions on the underlying matter.

===Linear, No Slope===
<math>f(x) = c</math>

Apparently, the person making this line figured out pretty early on that their data analysis was turning into a scatter plot, and wanted to escape their personal stigma of scatter plots by drawing an obviously false regression line on top of it. Alternatively, they were hoping the data would be flat, and are trying to pretend that there's no real trend to the data by drawing a horizontal trend line.

The comment below the graph ''"I'm making a scatter plot but I don't want to."'' is probably done by a student who isn't happy with its choice of field of study.

===Logistic===
[[File:Logistic-curve.svg|thumb|200px|A standard logistic function between the values ''0'' and ''1''.]]
The {{w|Logistic regression|logistic regression}} is taken when a variable can take binary results such as "0" and "1" or "old" and "young".

The curve provides a smooth, S-shaped transition curve between two flat intervals (like "0" and "1").

The comment below the graph ''"I need to connect these two lines, but my first idea didn't have enough math."'' implies the experimenter just wants to find a mathematically-respectable way to link two flat lines.

===Confidence Interval===
Not a type of curve fitting, but a method of depicting the predictive power of a curve.

Providing a confidence interval over the graph shows the uncertainty of the acquired data, thus acknowledging the uncertain results of the experiment, and showing the will not to "cheat" with "easy" regression curves.

The comment below the graph ''"Listen, science is hard. But I'm a serious person doing my best."'' is just an honest statement about this uncertainty.

===Piecewise===
Mapping different curves to different segments of the data. This is a legitimate strategy, but the different segments should be meaningful, such as if they were pulled from different populations.

This kind of fit would arise naturally in a study based on a regression discontinuity design. For instance, if students who score below a certain cutoff must take remedial classes, the line for outcomes of those below the cutoff would reasonably be separate from the one for outcomes above the cutoff; the distance between the end of the two lines could be considered the effect of the treatment, under certain assumptions. This kind of study design is used to investigate causal theories, where mere correlation in observational data is not enough to prove anything. Thus, the associated text would be appropriate; there is a theory, and data that might prove the theory is hard to find.

One notable time this is used is when a researcher studying housing economics is trying to identify housing submarkets. The assumption is that if two proposed markets are truly different, they will be better described using two different regression functions than if one were to be used.

The additional curved lines visible in the graph are the kind of confidence intervals you'd get from a simple OLS regression if the standard assumptions were valid. In the case of two separate regressions, it would be surprising if all those assumptions (that is, i.i.d. Normal residuals around an underlying perfectly-linear function) were in fact valid for each part, especially if the slopes are not equal.

A classical example in physics are the different theories to explain the black body radiation at the end of the 19th century. The {{w|Wien approximation}} was good for small wavelengths while the {{w|Rayleigh–Jeans law}} worked for the larger scales (large wavelength means low frequency and thus low energy.) But there was a gap in the middle which was filled by the {{w|Planck's law}} in 1900.

The comment below the graph ''"I have a theory, and this is the only data I could find."'' is a bit ambiguous because there are many data points ignored. Without an explanation why only a subset of the data is used this isn't a useful interpretation at all.

===Connecting lines===
This is often used to smooth gaps in measurements. A simple example is the weather temperature which is often measured in distinct intervals. When the intervals are high enough it's safe to assume that the temperature didn't change that much between them and connecting the data points by lines doesn't distort the real situation in many cases.

The comment below the graph ''"I clicked 'Smooth Lines' in {{w|Microsoft Excel|Excel}}."'' refers to the well known spreadsheet application from {{w|Microsoft Office}}. Like other spreadsheet applications it has the feature to visualize data from a table into a graph by many ways. "Smooth Lines" is a setting meant for use on a {{w|line graph}}, a graph in which one axis represents time; as it simply joins up every point rather than finding a sensible line, it is not suitable for regression.

===Ad-Hoc Filter===
Drawing a bunch of different lines by hand, keeping in only the data points perceived as "good". Not really useful except for marketing purposes.

The comment below the graph ''"I had an idea for how to clean up the data. What do you think?"'' admits that in fact the data is whitewashed and tightly focused to a result the presenter wants to show.

===House of Cards===
Not a real method, but a common consequence of misapplication of statistical methods: a curve can be generated that fits the data extremely well, but immediately becomes absurd as soon as one glances outside the training data sample range, and your analysis comes crashing down "like a house of cards". This is a type of ''overfitting''. In other words, the model may do quite well for (approximately) {{w|Interpolation|interpolating}} between values in the sample range, but not extend at all well to {{w|Extrapolation|extrapolating}} values outside that range.

''Note:'' Exact polynomial fitting, a fit which gives the unique <math>(n-1)</math>th degree polynomial through <math>n</math> points, often display this kind of behaviour.

The comment below the graph ''"As you can see, this model smoothly fits the- wait no no don't extend it AAAAAA!!"'' refers to a curve which fits the data points relatively well within the graph's boundaries, but beyond those bounds fails to match at all.

The name is also a reference to the TV show ''{{w|House of Cards (U.S. TV series)|House of Cards}}'' ("WAIT NO, NO, DON'T EXTEND IT!").

===Cauchy-Lorentz (title text)===
{{w|Cauchy_distribution|Cauchy-Lorentz}} is a continuous probability distribution which does not have an expected value or a defined variance. This means that the law of large numbers does not hold and that estimating e.g. the sample mean will diverge (be all over the place) the more data points you have. Hence very troublesome (mathematically alarming).

Since so many different models can fit this data set at first glance, Randall may be making a point about how if a data set is sufficiently messy, you can read any trend you want into it, and the trend that is chosen may say more about the researcher than about the data. This is a similar sentiment to [[1725: Linear Regression]], which also pokes fun at dubious trend lines on scatterplots.

A brief Google search reveals that Augustin-Louis Cauchy originally worked as a junior engineer in a managerial position. Upon his acceptance to the Académie des Sciences in March 1816, many of his peers expressed outrage. Despite his early work in "mere" engineering, Cauchy is widely regarded as one of the founding influences in the rigorous study of calculus & accompanying proofs.

Alternately, the title-text could be implying that the person who applied the Cauchy-Lorentz curve-fitting method may not be well qualified to the task assigned.

==Transcript==
:'''Curve-Fitting Methods'''
:and the messages they send

:[In a single frame twelve scatter plots with unlabeled x- and y-axes are shown. Each plot consists of the same data-set of approximately thirty points located all over the plot but slightly more distributed around the diagonal. Every plot shows in red a different fitting method which is labeled on top in gray.]

:[The first plot shows a line starting at the left bottom above the x-axis rising towards the points to the right.]
:Linear
:"Hey, I did a regression."

:[The second plot shows a curve falling slightly down and then rising up to the right.]
:Quadratic
:"I wanted a curved line, so I made one with math."

:[At the third plot the curve starts near the left bottom and increases more and more less to the right.]
:Logarithmic
:"Look, it's tapering off!"

:[The fourth plot shows a curve starting near the left bottom and increases more and more steeper towards the right.]
:Exponential
:"Look, it's growing uncontrollably!"

:[The fifth plot uses a fitting to match many points. It starts at the left bottom, increases, then decreases, then rapidly increasing again, and finally reaching a plateau.]
:LOESS
:"I'm sophisticated, not like those bumbling polynomial people."

:[The sixth plot simply shows a line above but parallel to the x-axis.]
:Linear, no slope
:"I'm making a scatter plot but I don't want to."

:[At plot #7 starts at a plateau above the x-axis, then increases, and finally reaches a higher plateau.]
:Logistic
:"I need to connect these two lines, but my first idea didn't have enough Math."

:[Plot #8 shows two red lines embedding most points and the area between is painted as a red shadow.]
:Confidence interval
:"Listen, science is hard. But I'm a serious person doing my best."

:[Plot #9 shows two not connected lines, one at the lower left half, and one higher at the right. Both have smaller curved lines in light red above and below.]
:Piecewise
:"I have a theory, and this is the only data I could find."

:[The plot at the left bottom shows a line connecting all points from left to right, resulting in a curve going many times up and down.]
:Connecting lines
:"I clicked 'Smooth Lines' in Excel."

:[The next to last plot shows a echelon form, connecting a few real and some imaginary points.]
:Ad-Hoc filter
:"I had an idea for how to clean up the data. What do you think?"

:[The last plot shows a wave with increasing peak values. Finally the plot of the wave is continued beyond the x- and y-axis borders.]
:House of Cards
:"As you can see, this model smoothly fits the- ''wait no no don't extend it AAAAAA!!''"

==Trivia==
*This is the comic 2048, or 211. In addition to being the name of a popular app referenced in [[1344: Digits]], this is an extremely round number in binary (100,000,000,0002). [[1000: 1000 Comics]] pointed out that comic 1024 would be a round number, but there were not any comics noting 2048.

*This comic is similar to [[977: Map Projections]] which also uses a scientific method not commonly thought about by the general public to determine specific characteristics of one's personality and approach to science.

*Regressions have been the subject of several previous comics. [[1725: Linear Regression]] was about linear regressions on uncorrelated or poorly correlated data. [[1007: Sustainable]], [[1204: Detail]] and [[1281: Minifigs]] depict linear regressions on data that was actually logistic, leading to bizarre extrapolations. [[605: Extrapolating]] shows a line extrapolating from just two data points.

{{comic discussion}}

[[Category:Comics with color]]
[[Category:Scatter plots]]
[[Category:Line graphs]]
[[Category:Math]]
[[Category:Science]]

Talk:1975: Right Click

2018-04-07T02:20:06Z

172.69.70.227:

I created this page manually. DgbrtBOT fail?

Also, notably, while the comic at xkcd.com works as intended (even from Chrome on Android, to a certain degree), the mobile site, m.xkcd.com, does not. It shows the standard system/browser-specific context menu. --[[User:Videblu|Videblu]] ([[User talk:Videblu|talk]]) 00:28, 2 April 2018 (UTC)
:The BOT didn't fail, the comic just wasn't released on Mon, Wen, or Fri. And in the past there was no comic on 1. April when it didn't fit into that rule. And the release was LATE; it was already the 2. April in Europe.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 09:45, 2 April 2018 (UTC)
:The mobile version at m.xkcd.com works fine in Android. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 10:56, 2 April 2018 (UTC)
::Untrue; going to m.xkcd.com on my Android devices brings up a '''non-interactive''' version of the comic, whereas going to xkcd.com (without setting the browser to present a Desktop client type) works fine. Viewing https://xkcd.com/1975 on mobile works fine for me; viewing https://m.xkcd.com/1975 does not work properly. I'm on Kit-Kat & Marshmallow, using the standard browsers; you? [[User:ProphetZarquon|ProphetZarquon]] ([[User talk:ProphetZarquon|talk]]) 16:04, 2 April 2018 (UTC)
:::You are right. I don't remember what I've tested before. It cannot work because the embedded [https://m.xkcd.com/1975/alto/comic.js JavaScript file] doesn't exist. Maybe this will be fixed in the future. --[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 17:46, 2 April 2018 (UTC)

How are we going to handle submenus submenus and subitems etc? (Also Captcha outdated! Update immediately!) [[Special:Contributions/162.158.238.34|162.158.238.34]] 01:46, 2 April 2018 (UTC)
:Um, I don't see a reCapatcha. Just saying...[[User:Fmccarthy|Fmccarthy]] ([[User talk:Fmccarthy|talk]]) 04:17, 2 April 2018 (UTC)
::There is one when saving edits. I'm assuming this is the one they mean. Also, aside from a table with way too many columns I don't really know. [[Special:Contributions/162.158.79.215|162.158.79.215]] 04:21, 2 April 2018 (UTC)
:::Captchas only appear for guests and young accounts. I haven't seen one since roughly the day after I signed up, LOL! (I commented a lot my first day, "taking" ownership of all my previous anonymous comments) [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 04:44, 3 April 2018 (UTC)

Oh my gosh this is incredible. The Games section, especially, is mind boggling. Entropy! [[User:Hameltion|Hameltion]] ([[User talk:Hameltion|talk]]) 00:30, 2 April 2018 (UTC)

Whoever owns this site update ReCaptcha! [[User:Sizzilingbird|Sizzilingbird]] ([[User talk:Sizzilingbird|talk]]) 00:40, 2 April 2018 (UTC)

WOO!!! [https://uni.xkcd.com/ Unicode XKCD]!!! [[User:Phoenix Up|Phoenix Up]] ([[User talk:Phoenix Up|talk]]) 00:44, 2 April 2018 (UTC)

2 hours later I'm done, and the save picture button wouldn't work... rip[[User:Linker|Linker]] ([[User talk:Linker|talk]]) 11:38, 2 April 2018 (UTC)

This (uni.xkcd.com) is not new, I remember using this months (perhaps years) ago :P [[User:PotatoGod|PotatoGod]] ([[User talk:PotatoGod|talk]]) 02:44, 2 April 2018 (UTC)

Is there a second for easter eggs in there? Fork bombs ( :(){ :|: &};: ) work, I'm not sure what else. [[User:Waterlubber|Waterlubber]] ([[User talk:Waterlubber|talk]]) 02:52, 2 April 2018 (UTC)

Sorry if this is already well known, but there are a couple unlisted commands, e.g. you can delete things individually using rm -rf. It looks like auto-completion and * don't work. [[User:Power Factor|Power Factor]] ([[User talk:Power Factor|talk]]) 03:27, 2 April 2018 (UTC)

Reluctant to call it an Easter Egg, but Utilities / Identify Song / Hey Now / Hey now na now / Sing "This Corrosion" to me inverts the colours on the comic/background [[User:Maslink|Maslink]] ([[User talk:Maslink|talk]]) 02:02, 2 April 2018 (UTC)

: He missed a chance for a Rick Roll there (For all we know there may be a Rick Roll in here) [[User:Phoenix Up|Phoenix Up]] ([[User talk:Phoenix Up|talk]]) 02:36, 2 April 2018 (UTC)

SPOILER:

I managed to save the image by playing ADVENT.exe, has anyone else found other ways? [[Special:Contributions/162.158.75.172|162.158.75.172]] 00:54, 2 April 2018 (UTC)

'''COMIC MAY BE UNDER CONSTRUCTION''' I think one of the menu options change since the comic was first posted. Randall may still be changing things. --[[User:Videblu|Videblu]] ([[User talk:Videblu|talk]]) 01:15, 2 April 2018 (UTC)
: I agree. It's not just that menu items unlock. On a fresh refresh of the comic, items are there that weren't there before, such as file > find > who what etc., some that had been greyed out are no longer grey.
: Actually it's that once you do some things others "unlock". For instance, accessing File > Open > A:\ > Insert > Floppy disk, and then File > Open > A:\ you get the Games, Music, and the really cool Bookmarks catalog of comics. Also, as said above, completing the game ADVENT.exe lets you go to save:
{{Collapse top|title=Egg spoiler: Text adventure route}}
* Games
* ADVENT.EXE
* Castle
* Well
* Pull up the bucket
* Examine bucket
* Get key
* Back
* Back to the castle
* Open door
* Get clamp
* This might come in handy
* Get outta here
* Enter castle
* Examine machine
* Hmmm
* Put clamp in C-Remover
* Take lamp
* Leave
* Go back
* Cave
* Go deeper
* N
* E
* N
* N
* N
* W
* S
* W
* Examine nest
* Take egg
* ''Click''
Now you can save [https://i.imgur.com/X4LX3w9.png the image]! :)
{{Collapse bottom}}
: I made it hidden so that anyone who wants to explore on their own may still... [[User:Hameltion|Hameltion]] ([[User talk:Hameltion|talk]]) 02:01, 2 April 2018 (UTC)
:How did you solve the maze? Is there a clue anywhere or just brute force?{{unsigned ip|141.101.98.196}}
::When at the Well, maybe try wishing for wisdom[[User:Steampunkery|Steampunkery]] ([[User talk:Steampunkery|talk]]) 19:44, 2 April 2018 (UTC)
:: The Help menu changed after I refreshed the page (that is what I see at first glance), other things may have changed as well. [[User:Phoenix Up|Phoenix Up]] ([[User talk:Phoenix Up|talk]]) 02:29, 2 April 2018 (UTC)
::: Ah - I don't recall it being different, but I may have missed an earlier version. Anyway here is another way to make the image available:
: C-remover is a reference to the interactive fiction "[http://emshort.com/counterfeit_monkey/ Counterfeit Monkey]". (Adding it for future restructure) [[Special:Contributions/162.158.134.142|162.158.134.142]] 08:00, 2 April 2018 (UTC)
:: I claimed earlier that it was a Counterfeit Monkey reference on the Reddit thread, but someone who worked on the comic pointed out on [https://twitter.com/wirehead2501/status/980703946971860993 Twitter] that it is actually a reference to "Leather Goddesses of Phobos", though Counterfeit Monkey also uses that mechanic. [[Special:Contributions/172.69.90.52|172.69.90.52]] 16:23, 2 April 2018 (UTC)
{{Collapse top|title=Egg spoiler: London Underground route}}.
* Games
* Mornington Crescent
* Euston
* Warren Street
* Oxford Circus
* Green Park
* Victoria
* Pimlico
* Vauxhall
* Easter basket
* Take egg (''Click'')
Though in reality it may be [https://www.google.com/maps/dir/Mornington+Crescent,+London+NW1+2JA,+United+Kingdom/Vauxhall,+London,+UK/@51.5103249,-0.1720918,13z/data=!3m1!4b1!4m14!4m13!1m5!1m1!1s0x48761b2037dd36b9:0x11812a2d5cfb2ea3!2m2!1d-0.1388607!2d51.5343884!1m5!1m1!1s0x487604ec2b79a13d:0xdfa3f51e98dee89c!2m2!1d-0.1227798!2d51.4861366!3e1 faster to bike]?
{{Collapse bottom}}
:::This is really fun! (and there's [https://xkcd.com/1975/kat-bun-small.png this]) --[[User:Hameltion|Hameltion]] ([[User talk:Hameltion|talk]]) 02:43, 2 April 2018 (UTC)

I followed the "Land of 1000 dances" "na-na"s over 1000 times and didn't hit an end. It may be infinite. [[User:Jedi.jesse|Jedi.jesse]] ([[User talk:Jedi.jesse|talk]]) 02:45, 2 April 2018 (UTC)

Doing System > / > home/ > guest (''click'') takes you to [https://uni.xkcd.com/ uni.xkcd.com] which it pretty neat. [[User:Hameltion|Hameltion]] ([[User talk:Hameltion|talk]]) 02:53, 2 April 2018 (UTC)

List of D&D spells can be ported into explanation from [https://www.reddit.com/r/dndnext/comments/88vwoe/xkcds_latest_comic_has_a_dd_easter_egg/ here].
And [https://www.reddit.com/r/xkcd/comments/88v6if/xkcd_1975_right_click/dwnp4ml/ here] is a path through Mornington Crescent to an easter egg.
[[Special:Contributions/162.158.134.142|162.158.134.142]] 07:52, 2 April 2018 (UTC)

https://en.wikipedia.org/wiki/Mornington_Crescent_(game) Mornington Crescent is a joke nonsensical game from an old British radio show. {{unsigned ip|141.101.98.142}}

You actually can install apt with brew. It can't actually install anything because it needs to create a package record during the initial operating system install, but you can do it if you want to. Not sure why you would though. EDIT: I can't find the package anymore, but I am pretty sure I was able to do this at one point. Might have been removed due to uselessness. [[Special:Contributions/172.68.34.64|172.68.34.64]] 00:08, 3 April 2018 (UTC)

;Land of 1,000 Dances
This goes on forever. Or at least well over 1000 levels: [Media:https://i.imgur.com/iiHDE3e.png number of popups checked with jQuery]--[[User:MikeOShay|MikeOShay]] ([[User talk:MikeOShay|talk]]) 04:21, 2 April 2018 (UTC)

;Transscript
Is the transscript really unfinished? It transcribes the entirety of the comic image itself, and the menu part is in explanations. [[Special:Contributions/162.158.238.142|162.158.238.142]] 05:36, 2 April 2018 (UTC)

;Release date
This comic was probably released on April 2, 00:00 UTC. But of course it was still April 1 in the US. I don't really care, but the release date here is probably wrong.--[[User:Dgbrt|Dgbrt]] ([[User talk:Dgbrt|talk]]) 11:31, 2 April 2018 (UTC)

;More discussions
No effect for iOS. --[[Special:Contributions/162.158.138.88|162.158.138.88]] 05:37, 2 April 2018 (UTC)

If you quickly right click on the comic after refreshing the page, it is possible to save the comic. Unfortunately there is no easter egg for doing so. [[User:Baquea|Baquea]] ([[User talk:Baquea|talk]]) 12:26, 2 April 2018 (UTC)

Added it to the page. ~~~~ 02:49, 3 April 2018 (UTC)

Katamari in the music bit is a reference to [https://youtu.be/iMH49ieL4es?t=48s this song] --[[Special:Contributions/141.101.99.137|141.101.99.137]] 13:31, 2 April 2018 (UTC)

spell list (half of it, i didnt test spells with material components): --norill
{{Collapse top|title=Spellbook}}
{| class="wikitable sortable"
!V !! S !! M !! L !! School !! Spell !! Class !! Result
|-
|V || - || - || 2 || Illusion || Blur || Wizard || Causes the screen/comic to appear blurry
|-
|V || - || - || 2 || Illusion || Blur || Sorcerer || Causes the screen/comic to appear blurry
|-
|V || - || - || 5 || Divination || Contact Other Plane || Wizard
|-
|V || - || - || 5 || Divination || Contact Other Plane || Warlock
|-
|V || - || - || 1 || Divination || Hunter's Mark || Ranger
|-
|V || - || - || 2 || Necromancy || Blindness/Deafness || Wizard
|-
|V || - || - || 2 || Necromancy || Blindness/Deafness || Sorcerer
|-
|V || - || - || 2 || Necromancy || Blindness/Deafness || Cleric
|-
|V || - || - || 2 || Necromancy || Blindness/Deafness || Bard
|-
|V || - || - || 9 || Enchantment || Power Word Kill || Wizard
|-
|V || - || - || 9 || Enchantment || Power Word Kill || Sorcerer
|-
|V || - || - || 9 || Enchantment || Power Word Kill || Warlock
|-
|V || - || - || 9 || Enchantment || Power Word Kill || Bard
|-
|V || - || - || 8 || Enchantment || Power Word Stun || Wizard || Links to https://what-if.xkcd.com/156/
|-
|V || - || - || 8 || Enchantment || Power Word Stun || Sorcerer || Links to https://what-if.xkcd.com/156/
|-
|V || - || - || 8 || Enchantment || Power Word Stun || Warlock || Links to https://what-if.xkcd.com/156/
|-
|V || - || - || 8 || Enchantment || Power Word Stun || Bard || Links to https://what-if.xkcd.com/156/
|-
|V || - || - || 6 || Enchantment || Irresistible Dance || Wizard || Links to https://xkcd.com/878/
|-
|V || - || - || 6 || Enchantment || Irresistible Dance || Bard || Links to https://xkcd.com/878/
|-
|V || - || - || 5 || Enchantment || Geas || Wizard || Links to https://xkcd.com/1559/
|-
|V || - || - || 5 || Enchantment || Geas || Paladin || Links to https://xkcd.com/1559/
|-
|V || - || - || 5 || Enchantment || Geas || Druid || Links to https://xkcd.com/1559/
|-
|V || - || - || 5 || Enchantment || Geas || Cleric || Links to https://xkcd.com/1559/
|-
|V || - || - || 5 || Enchantment || Geas || Bard || Links to https://xkcd.com/1559/
|-
|V || - || - || 1 || Enchantment || Command || Paladin || Links to https://xkcd.com/857/
|-
|V || - || - || 1 || Enchantment || Command || Cleric || Links to https://xkcd.com/857/
|-
|V || - || - || 0 || Enchantment || Vicious Mockery || Bard || Links to https://xkcd.com/732/
|-
|V || - || - || 9 || Transmutation || Time Stop || Wizard
|-
|V || - || - || 9 || Transmutation || Time Stop || Sorcerer
|-
|V || - || - || 8 || Transmutation || Glibness || Warlock
|-
|V || - || - || 8 || Transmutation || Glibness || Bard
|-
|V || - || - || 2 || Transmutation || Knock || Wizard
|-
|V || - || - || 2 || Transmutation || Knock || Sorcerer
|-
|V || - || - || 2 || Transmutation || Knock || Bard
|-
|V || - || - || 0 || Transmutation || Thaumaturgy || Cleric
|-
|V || - || - || 9 || Conjuration || Wish || Wizard
|-
|V || - || - || 9 || Conjuration || Wish || Sorcerer
|-
|V || - || - || 6 || Conjuration || Word of Recall || Cleric
|-
|V || - || - || 4 || Conjuration || Dimension Door || Wizard
|-
|V || - || - || 4 || Conjuration || Dimension Door || Warlock
|-
|V || - || - || 4 || Conjuration || Dimension Door || Sorcerer
|-
|V || - || - || 4 || Conjuration || Dimension Door || Bard
|-
|V || - || - || 4 || Conjuration || Guardian of Faith || Cleric
|-
|V || - || - || 2 || Conjuration || Misty Steep || Wizard
|-
|V || - || - || 2 || Conjuration || Misty Steep || Warlock
|-
|V || - || - || 2 || Conjuration || Misty Steep || Sorcerer
|-
|V || - || - || 7 || Evocation || Divine Word || Cleric
|-
|V || - || - || 3 || Evocation || Mass Healing Word || Cleric
|-
|V || - || - || 2 || Evocation || Prayer of Healing || Cleric
|-
|V || - || - || 2 || Evocation || Branding Smite || Paladin
|-
|V || - || - || 1 || Evocation || Healing Word || Druid
|-
|V || - || - || 1 || Evocation || Healing Word || Cleric
|-
|V || - || - || 1 || Evocation || Healing Word || Bard
|-
|V || - || - || 1 || Evocation || Faerie Fire || Druid
|-
|V || - || - || 1 || Evocation || Faerie Fire || Bard
|-
|- || S || - || 5 || Illusion || Mislead || Wizard
|-
|- || S || - || 5 || Illusion || Mislead || Bard
|-
|- || S || - || 0 || Divination || True Strike || Wizard
|-
|- || S || - || 0 || Divination || True Strike || Warlock
|-
|- || S || - || 0 || Divination || True Strike || Sorcerer
|-
|- || S || - || 0 || Divination || True Strike || Bard
|-
|- || S || - || 3 || Abjuration || Counterspell || Wizard
|-
|- || S || - || 3 || Abjuration || Counterspell || Warlock
|-
|- || S || - || 8 || Conjuration || Demiplane || Wizard
|-
|- || S || - || 8 || Conjuration || Demiplane || Warlock
|-
|V || S || - || 9 || Illusion || Weird || Wizard
|-
|V || S || - || 7 || Illusion || Mirage Arcane || Wizard
|-
|V || S || - || 7 || Illusion || Mirage Arcane || Druid
|-
|V || S || - || 7 || Illusion || Mirage Arcane || Bard
|-
|V || S || - || 5 || Illusion || Seeming || Wizard
|-
|V || S || - || 5 || Illusion || Seeming || Sorcerer
|-
|V || S || - || 5 || Illusion || Seeming || Bard
|-
|V || S || - || 4 || Illusion || Greater Invisibility || Wizard
|-
|V || S || - || 4 || Illusion || Greater Invisibility || Sorcerer
|-
|V || S || - || 4 || Illusion || Greater Invisibility || Bard
|-
|V || S || - || 4 || Illusion || Phantasmal Killer || Wizard
|-
|V || S || - || 3 || Illusion || Phantom Steed || Wizard
|-
|V || S || - || 2 || Illusion || Mirror Image || Wizard
|-
|V || S || - || 2 || Illusion || Mirror Image || Warlock
|-
|V || S || - || 2 || Illusion || Mirror Image || Sorcerer
|-
|V || S || - || 2 || Illusion || Silence || Ranger
|-
|V || S || - || 2 || Illusion || Silence || Cleric
|-
|V || S || - || 2 || Illusion || Silence || Bard
|-
|V || S || - || 1 || Illusion || Disguise Self || Wizard
|-
|V || S || - || 1 || Illusion || Disguise Self || Sorcerer
|-
|V || S || - || 1 || Illusion || Disguise Self || Bard
|-
|V || S || - || 5 || Divination || Commune with Nature || Ranger
|-
|V || S || - || 5 || Divination || Commune with Nature || Druid
|-
|V || S || - || 2 || Divination || Find Traps || Ranger
|-
|V || S || - || 2 || Divination || Find Traps || Druid
|-
|V || S || - || 2 || Divination || Find Traps || Cleric
|-
|V || S || - || 1 || Divination || Detect Magic || Wizard
|-
|V || S || - || 1 || Divination || Detect Magic || Sorcerer
|-
|V || S || - || 1 || Divination || Detect Magic || Ranger
|-
|V || S || - || 1 || Divination || Detect Magic || Paladin
|-
|V || S || - || 1 || Divination || Detect Magic || Druid
|-
|V || S || - || 1 || Divination || Detect Magic || Cleric
|-
|V || S || - || 1 || Divination || Detect Magic || Bard
|-
|V || S || - || 1 || Divination || Speak with Animals || Ranger
|-
|V || S || - || 1 || Divination || Speak with Animals || Druid
|-
|V || S || - || 1 || Divination || Speak with Animals || Bard
|-
|V || S || - || 1 || Divination || Detect Evil and Good || Paladin
|-
|V || S || - || 1 || Divination || Detect Evil and Good || Cleric
|-
|V || S || - || 0 || Divination || Guidance || Druid
|-
|V || S || - || 0 || Divination || Guidance || Cleric
|-
|V || S || - || 7 || Necromancy || Finger of Death || Wizard
|-
|V || S || - || 7 || Necromancy || Finger of Death || Warlock
|-
|V || S || - || 7 || Necromancy || Finger of Death || Sorcerer
|-
|V || S || - || 6 || Necromancy || Eyebite || Wizard
|-
|V || S || - || 6 || Necromancy || Eyebite || Warlock
|-
|V || S || - || 6 || Necromancy || Eyebite || Sorcerer
|-
|V || S || - || 6 || Necromancy || Eyebite || Bard
|-
|V || S || - || 6 || Necromancy || Harm || Cleric
|-
|V || S || - || 5 || Necromancy || Contagion || Druid
|-
|V || S || - || 5 || Necromancy || Contagion || Cleric
|-
|V || S || - || 4 || Necromancy || Blight || Wizard
|-
|V || S || - || 4 || Necromancy || Blight || Warlock
|-
|V || S || - || 4 || Necromancy || Blight || Sorcerer
|-
|V || S || - || 4 || Necromancy || Blight || Druid
|-
|V || S || - || 3 || Necromancy || Vampiric Touch || Wizard
|-
|V || S || - || 3 || Necromancy || Vampiric Touch || Warlock
|-
|V || S || - || 3 || Necromancy || Bestow Curse || Wizard
|-
|V || S || - || 3 || Necromancy || Bestow Curse || Cleric
|-
|V || S || - || 3 || Necromancy || Bestow Curse || Bard
|-
|V || S || - || 2 || Necromancy || Ray of Enfeeblement || Wizard
|-
|V || S || - || 2 || Necromancy || Ray of Enfeeblement || Warlock
|-
|V || S || - || 1 || Necromancy || Inflict Wounds || Cleric
|-
|V || S || - || 0 || Necromancy || Chill Touch || Wizard
|-
|V || S || - || 0 || Necromancy || Chill Touch || Warlock
|-
|V || S || - || 0 || Necromancy || Chill Touch || Sorcerer
|-
|V || S || - || 8 || Enchantment || Dominate Monster || Wizard
|-
|V || S || - || 8 || Enchantment || Dominate Monster || Warlock
|-
|V || S || - || 8 || Enchantment || Dominate Monster || Sorcerer
|-
|V || S || - || 8 || Enchantment || Dominate Monster || Bard
|-
|V || S || - || 5 || Enchantment || Dominate Person || Wizard
|-
|V || S || - || 5 || Enchantment || Dominate Person || Sorcerer
|-
|V || S || - || 5 || Enchantment || Dominate Person || Bard
|-
|V || S || - || 5 || Enchantment || Modify Memory || Wizard
|-
|V || S || - || 5 || Enchantment || Modify Memory || Bard
|-
|V || S || - || 4 || Enchantment || Dominate Beast || Sorcerer
|-
|V || S || - || 4 || Enchantment || Dominate Beast || Druid
|-
|V || S || - || 4 || Enchantment || Compulsion || Bard
|-
|V || S || - || 2 || Enchantment || Enthrall || Warlock
|-
|V || S || - || 2 || Enchantment || Enthrall || Bard
|-
|V || S || - || 2 || Enchantment || Zone of Truth || Paladin
|-
|V || S || - || 2 || Enchantment || Zone of Truth || Cleric
|-
|V || S || - || 2 || Enchantment || Zone of Truth || Bard
|-
|V || S || - || 2 || Enchantment || Calm Emotions || Cleric
|-
|V || S || - || 2 || Enchantment || Calm Emotions || Bard
|-
|V || S || - || 1 || Enchantment || Charm Person || Wizard
|-
|V || S || - || 1 || Enchantment || Charm Person || Warlock
|-
|V || S || - || 1 || Enchantment || Charm Person || Sorcerer
|-
|V || S || - || 1 || Enchantment || Charm Person || Druid
|-
|V || S || - || 1 || Enchantment || Charm Person || Bard
|-
|V || S || - || 1 || Enchantment || Heroism || Paladin
|-
|V || S || - || 1 || Enchantment || Heroism || Bard
|-
|V || S || - || 8 || Transmutation || Animal Shapes || Druid
|-
|V || S || - || 7 || Transmutation || Etherealness || Wizard
|-
|V || S || - || 7 || Transmutation || Etherealness || Warlock
|-
|V || S || - || 7 || Transmutation || Etherealness || Sorcerer
|-
|V || S || - || 7 || Transmutation || Etherealness || Cleric
|-
|V || S || - || 7 || Transmutation || Etherealness || Bard
|-
|V || S || - || 5 || Transmutation || Telekinesis || Wizard
|-
|V || S || - || 5 || Transmutation || Telekinesis || Sorcerer
|-
|V || S || - || 5 || Transmutation || Animate Objects || Wizard
|-
|V || S || - || 5 || Transmutation || Animate Objects || Sorcerer
|-
|V || S || - || 5 || Transmutation || Animate Objects || Bard
|-
|V || S || - || 4 || Transmutation || Fabricate || Wizard
|-
|V || S || - || 4 || Transmutation || Giant Insect || Druid
|-
|V || S || - || 3 || Transmutation || Blink || Wizard
|-
|V || S || - || 3 || Transmutation || Blink || Sorcerer
|-
|V || S || - || 3 || Transmutation || Plant Growth || Ranger
|-
|V || S || - || 3 || Transmutation || Plant Growth || Druid
|-
|V || S || - || 3 || Transmutation || Plant Growth || Bard
|-
|V || S || - || 3 || Transmutation || Speak with Plants || Ranger
|-
|V || S || - || 3 || Transmutation || Speak with Plants || Druid
|-
|V || S || - || 3 || Transmutation || Speak with Plants || Bard
|-
|V || S || - || 3 || Transmutation || Meld into Stone || Druid
|-
|V || S || - || 3 || Transmutation || Meld into Stone || Cleric
|-
|V || S || - || 2 || Transmutation || Alter Self || Wizard
|-
|V || S || - || 2 || Transmutation || Alter Self || Sorcerer
|-
|V || S || - || 2 || Transmutation || Magic Weapon || Paladin
|-
|V || S || - || 1 || Transmutation || Expeditious Retreat || Wizard
|-
|V || S || - || 1 || Transmutation || Expeditious Retreat || Warlock
|-
|V || S || - || 1 || Transmutation || Expeditious Retreat || Sorcerer
|-
|V || S || - || 1 || Transmutation || Purify Food and Drink || Paladin
|-
|V || S || - || 1 || Transmutation || Purify Food and Drink || Druid
|-
|V || S || - || 1 || Transmutation || Purify Food and Drink || Cleric
|-
|V || S || - || 0 || Transmutation || Prestidigitation || Wizard
|-
|V || S || - || 0 || Transmutation || Prestidigitation || Warlock
|-
|V || S || - || 0 || Transmutation || Prestidigitation || Sorcerer
|-
|V || S || - || 0 || Transmutation || Prestidigitation || Bard
|-
|V || S || - || 0 || Transmutation || Druidcraft || Druid
|-
|V || S || - || 9 || Abjuration || Prismatic Wall || Wizard
|-
|V || S || - || 8 || Abjuration || Mind Blank || Wizard
|-
|V || S || - || 8 || Abjuration || Mind Blank || Bard
|-
|V || S || - || 4 || Abjuration || Death Ward || Paladin
|-
|V || S || - || 4 || Abjuration || Death Ward || Cleric
|-
|V || S || - || 3 || Abjuration || Protection from Energy || Wizard
|-
|V || S || - || 3 || Abjuration || Protection from Energy || Sorcerer
|-
|V || S || - || 3 || Abjuration || Protection from Energy || Ranger
|-
|V || S || - || 3 || Abjuration || Protection from Energy || Druid
|-
|V || S || - || 3 || Abjuration || Remove Curse || Wizard
|-
|V || S || - || 3 || Abjuration || Remove Curse || Warlock
|-
|V || S || - || 3 || Abjuration || Remove Curse || Paladin
|-
|V || S || - || 3 || Abjuration || Remove Curse || Cleric
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Wizard
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Warlock
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Sorcerer
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Paladin
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Druid
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Cleric
|-
|V || S || - || 3 || Abjuration || Dispel Magic || Bard
|-
|V || S || - || 3 || Abjuration || Beacon of Hope || Cleric
|-
|V || S || - || 2 || Abjuration || Lesser Restoration || Ranger
|-
|V || S || - || 2 || Abjuration || Lesser Restoration || Paladin
|-
|V || S || - || 2 || Abjuration || Lesser Restoration || Druid
|-
|V || S || - || 2 || Abjuration || Lesser Restoration || Cleric
|-
|V || S || - || 2 || Abjuration || Lesser Restoration || Bard
|-
|V || S || - || 2 || Abjuration || Protection from Poison || Ranger
|-
|V || S || - || 2 || Abjuration || Protection from Poison || Paladin
|-
|V || S || - || 2 || Abjuration || Protection from Poison || Druid
|-
|V || S || - || 2 || Abjuration || Protection from Poison || Cleric
|-
|V || S || - || 1 || Abjuration || Shield || Wizard
|-
|V || S || - || 1 || Abjuration || Shield || Sorcerer
|-
|V || S || - || 9 || Conjuration || Storm of Vegance || Druid
|-
|V || S || - || 8 || Conjuration || Maze || Wizard
|-
|V || S || - || 8 || Conjuration || Incendiary Cloud || Wizard
|-
|V || S || - || 8 || Conjuration || Incendiary Cloud || Sorcerer
|-
|V || S || - || 7 || Conjuration || Conjure Celestial || Cleric
|-
|V || S || - || 6 || Conjuration || Transport via Plants || Druid
|-
|V || S || - || 6 || Conjuration || Planar Ally || Cleric
|-
|V || S || - || 5 || Conjuration || Cloudkill || Wizard
|-
|V || S || - || 5 || Conjuration || Cloudkill || Sorcerer
|-
|V || S || - || 5 || Conjuration || Tree Stride || Ranger
|-
|V || S || - || 5 || Conjuration || Tree Stride || Druid
|-
|V || S || - || 3 || Conjuration || Conjure Animals || Ranger
|-
|V || S || - || 3 || Conjuration || Conjure Animals || Druid
|-
|V || S || - || 3 || Conjuration || Create Food and Water || Paladin
|-
|V || S || - || 3 || Conjuration || Create Food and Water || Cleric
|-
|V || S || - || 3 || Conjuration || Call Lightning || Druid
|-
|V || S || - || 2 || Conjuration || Find Steed || Paladin
|-
|V || S || - || 1 || Conjuration || Fog Cloud || Wizard
|-
|V || S || - || 1 || Conjuration || Fog Cloud || Sorcerer
|-
|V || S || - || 1 || Conjuration || Fog Cloud || Ranger
|-
|V || S || - || 1 || Conjuration || Fog Cloud || Druid
|-
|V || S || - || 1 || Conjuration || Entangle || Druid
|-
|V || S || - || 0 || Conjuration || Acid Splash || Wizard
|-
|V || S || - || 0 || Conjuration || Acid Splash || Sorcerer
|-
|V || S || - || 0 || Conjuration || Poison Spray || Wizard
|-
|V || S || - || 0 || Conjuration || Poison Spray || Warlock
|-
|V || S || - || 0 || Conjuration || Poison Spray || Sorcerer
|-
|V || S || - || 0 || Conjuration || Poison Spray || Druid
|-
|V || S || - || 0 || Conjuration || Mage Hand || Wizard
|-
|V || S || - || 0 || Conjuration || Mage Hand || Warlock
|-
|V || S || - || 0 || Conjuration || Mage Hand || Sorcerer
|-
|V || S || - || 0 || Conjuration || Mage Hand || Bard
|-
|V || S || - || 0 || Conjuration || Produce Flame || Druid
|-
|V || S || - || 9 || Evocation || Meteor Swarm || Wizard
|-
|V || S || - || 9 || Evocation || Meteor Swarm || Sorcerer
|-
|V || S || - || 9 || Evocation || Mass Heal || Cleric
|-
|V || S || - || 7 || Evocation || Prismatic Spray || Wizard
|-
|V || S || - || 7 || Evocation || Prismatic Spray || Sorcerer
|-
|V || S || - || 7 || Evocation || Fire Storm || Sorcerer
|-
|V || S || - || 7 || Evocation || Fire Storm || Druid
|-
|V || S || - || 7 || Evocation || Fire Storm || Cleric
|-
|V || S || - || 6 || Evocation || Heal || Druid
|-
|V || S || - || 6 || Evocation || Heal || Cleric
|-
|V || S || - || 6 || Evocation || Blade Barrier || Cleric
|-
|V || S || - || 5 || Evocation || Mass Cure Wounds || Druid
|-
|V || S || - || 5 || Evocation || Mass Cure Wounds || Cleric
|-
|V || S || - || 5 || Evocation || Mass Cure Wounds || Bard
|-
|V || S || - || 3 || Evocation || Daylight || Ranger
|-
|V || S || - || 3 || Evocation || Daylight || Paladin
|-
|V || S || - || 3 || Evocation || Daylight || Druid
|-
|V || S || - || 3 || Evocation || Daylight || Cleric
|-
|V || S || - || 2 || Evocation || Scorching Ray || Wizard
|-
|V || S || - || 2 || Evocation || Scorching Ray || Sorcerer
|-
|V || S || - || 2 || Evocation || Spiritual Weapon || Cleric
|-
|V || S || - || 1 || Evocation || Burning Hands || Wizard
|-
|V || S || - || 1 || Evocation || Burning Hands || Sorcerer
|-
|V || S || - || 1 || Evocation || Magic Missle || Wizard
|-
|V || S || - || 1 || Evocation || Magic Missle || Sorcerer
|-
|V || S || - || 1 || Evocation || Thunderwave || Wizard
|-
|V || S || - || 1 || Evocation || Thunderwave || Sorcerer
|-
|V || S || - || 1 || Evocation || Thunderwave || Druid
|-
|V || S || - || 1 || Evocation || Thunderwave || Bard
|-
|V || S || - || 1 || Evocation || Hellish Rebuke || Warlock
|-
|V || S || - || 1 || Evocation || Cure Wounds || Ranger
|-
|V || S || - || 1 || Evocation || Cure Wounds || Paladin
|-
|V || S || - || 1 || Evocation || Cure Wounds || Druid
|-
|V || S || - || 1 || Evocation || Cure Wounds || Cleric
|-
|V || S || - || 1 || Evocation || Cure Wounds || Bard
|-
|V || S || - || 1 || Evocation || Divine Favor || Paladin
|-
|V || S || - || 1 || Evocation || Guiding Bolt || Cleric
|-
|V || S || - || 0 || Evocation || Fire Bolt || Wizard
|-
|V || S || - || 0 || Evocation || Fire Bolt || Sorcerer
|-
|V || S || - || 0 || Evocation || Ray of Frost || Wizard
|-
|V || S || - || 0 || Evocation || Ray of Frost || Sorcerer
|-
|V || S || - || 0 || Evocation || Shocking Gasp || Wizard
|-
|V || S || - || 0 || Evocation || Shocking Gasp || Sorcerer
|-
|V || S || - || 0 || Evocation || Eldritch Blast || Warlock
|-
|V || S || - || 0 || Evocation || Sacred Flame || Cleric
|-
|}
{{Collapse bottom}} {{unsigned ip|172.68.110.52}}

'''Recursive package managers''' are perfectly sane if the two package managers use different repositories, for example apt install python3-pip. The true hilarity arrives if you install a package manager for the sole purpose of installing another, or if they use the same repositories. But that's not unheard of either: apt install npm && npm install yarn -78.68.24.134 but your site thinks I'm [[Special:Contributions/162.158.134.130|162.158.134.130]] 16:42, 2 April 2018 (UTC)

;Bing image search
Surprisingly, when you are playing 20 questions and get into the section with the animals, all of the image requests go to Bing.

I'm curious if anyone will look at the traffic of Bing and compare the normal traffic with the traffic from this comic. I want to see just how much of a spike Bing image search gets from this.

And by the way, "Bing" is actually a red underlined misspelling according to Firefox.
[[User:Keybounce|Keybounce]] ([[User talk:Keybounce|talk]]) 19:48, 2 April 2018 (UTC)

Is there a reason why UniXKCD is under comic 721? Also, there are significant things missing from it, especially the special ctrl- functions! [[User:ChunyangD|ChunyangD]] ([[User talk:ChunyangD|talk]]) 02:56, 3 April 2018 (UTC)

I read the comic, tried to save, it saved. Check what saved, was the same comic. How boring. LOL! Guess Randall doesn't think people read XKCD on iPads (or maybe just that he doesn't think anybody is reading on an iPad 1 with iOS 5.1.1). :) [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 04:44, 3 April 2018 (UTC)
:Not your iOS 5.1.1's problem, basically all the interactive comics are like that with iPads, even if using iOS 10. (On my iPad, [[1608: Hoverboard]] works but lags and controls are awful, [[1663: Garden]] can't run, [[1037: Umwelt]] refuses to appear, you can't do anything in [[1193: Externalities]], and as for ''this comic''... *flips table* ) The only comic that works perfectly on my iPad is [[1350: Lorenz]]. [[User:Herobrine|Herobrine]] ([[User talk:Herobrine|talk]]) 11:25, 3 April 2018 (UTC)
::Yeah, that's been my experience. I remember for Umwelt I got what looked like a black hole, which I think might have been the titular Umwelt. I seem to recall the description identified that as being some obscure set up I've never heard of, LOL! I also remember Garden didnt even do anything on my computer! I could change the lights, but that was it. I can't remember Externalities and Lorenz by name. But since my iPad CAN save images I hoped this would be different. Like saving it would, as promised, save a different comic (like Umwelt showed a different comic depending on your set up and connection). *sigh* [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 04:28, 6 April 2018 (UTC)
::EDIT: Checking now, can't remember seeing Externalities, I've certainly never tried it on a computer (I think I just dismissed it as "Oh well" and moved on). Lorenz I did indeed try it a bit on a computer. Hoverboard I went literally everywhere reachable, LOL! [[User:NiceGuy1|NiceGuy1]] ([[User talk:NiceGuy1|talk]]) 04:34, 6 April 2018 (UTC)

;Graph
[https://i.imgur.com/4X4jD6j.png This] is what the whole network of menus looks like, minus the massive Comics tree. The big cluster near the center is the DnD game, and the single-file trail on the left is Who's on First. Blue circles are menus, red are links, purple are client-side JS calls, pinks are null (they just collapse the menu), and yellows are "tags" - client-side state variables that are set or unset by some menu options. The orphaned pair of grey dots at the top are the Save menu, which is only visible when a tag is set by the ADVENT.EXE or Mornington Crescent games. I'll try to make this some kind of interactive graph that people can explore - the actual DB I made contains more data than is visible in the image. [[User:Okofish|Okofish]] ([[User talk:Okofish|talk]]) 15:27, 3 April 2018 (UTC)

I made a scraper that downloads all the jsons, and also makes a graphviz graph. Code: https://github.com/ad1217/xkcd1975scraper, Graph: https://raw.githubusercontent.com/ad1217/xkcd1975scraper/master/out.svg (save the graph and open it in Inkscape or something, it is rather large). [[User:Ad1217|Ad1217]] ([[User talk:Ad1217|talk]]) 19:58, 3 April 2018 (UTC)

;Where is the javascript source?

Where is the source file for this comic? I had trouble figuring out what was happening from opening my browser console. I can usually figure out things like e.g. kittens game, etc. Which file has the source for the right click menu in this comic? [[Special:Contributions/108.162.210.130|108.162.210.130]] 17:41, 3 April 2018 (UTC)
:It's [https://xkcd.com/1975/alto/comic.js here], but the interesting stuff happens server-side. You'll get more info by looking at the network tab in your browser's developer tools. [[User:Okofish|Okofish]] ([[User talk:Okofish|talk]]) 19:03, 3 April 2018 (UTC)

None of the "links to ___" things actually link to anything here. I guess they use window.open or something similarly silly that does not work in real browsers. [[Special:Contributions/162.158.210.88|162.158.210.88]] 08:43, 4 April 2018 (UTC)

When you play the "Backup" noise, the audio quality isn't that great, it seems to be recorded from a device. Also, you can hear what seems to be a bird chirping and a mouse click. Can anyone else verify this? [[User:625571b7-aa66-4f98-ac5c-92464cfb4ed8|625571b7-aa66-4f98-ac5c-92464cfb4ed8]] ([[User talk:625571b7-aa66-4f98-ac5c-92464cfb4ed8|talk]]) 22:39, 4 April 2018 (UTC)

This morning I tried to follow the path in the cave again (in ADVENT.EXE) but found that it's changed, the cave leads me to a "grue" which ate me, now ADVENT.EXE just returns "you've been eaten by a grue" and doesn't let me go anywhere. [[Special:Contributions/108.162.221.113|108.162.221.113]] 13:06, 5 April 2018 (UTC) Sam

Sooooo just FYI, any similarities to Ready Player One are 100% unintentional. (I can't speak for Randall but I worked on that bit and I haven't read/seen it.) It was just an Easter egg unlock because it was... literally Easter. And we put it there and in Mornington Crescent as the longest/most complicated paths. Apparently if you throw enough 80s/90s nerd references at the wall now, you get Ready Player One. ¯\_(ツ)_/¯ [[Special:Contributions/172.68.141.232|172.68.141.232]] 18:46, 5 April 2018 (UTC)

1966: Smart Home Security

2018-03-12T22:01:28Z

172.69.70.227:

{{comic
| number = 1966
| date = March 12, 2018
| title = Smart Home Security
| image = smart_home_security.png
| titletext = If they're getting valuable enough stuff from you, at least the organized crime folks have an incentive to issue regular updates to keep the appliance working after the manufacturer discontinues support.
}}

==Explanation==
{{incomplete|Created by A SPAMMER WHO RAISES OBVIOUSLY UNIMPORTANT ISSUES TO JUSTIFY THEIR UNNECESSARY 'INCOMPLETE' TAGS - Can someone find some examples if anyone has been spied on by "hackers"? Confirm that the graph means "the oldest the device, worst the best-case is".}}

With all the sensors on a smart appliance, a common fear is that someone (Whether it be a hacker, or even the company that released the product) is spying, collecting information on everything you do.

Now, with all the potential incentive, it is pretty likely that hackers are, and have been trying to find exploits to take over the device.
Assuming it is taken over, it could be added to a {{w|botnet}}. The collected data could then be sold, and the hardware could be used for DDOS attacks etc. Either could yield the "hacker" a hefty profit.

With the potential threat always looming, security updates must be constantly pushed, and exploits must be found by "White hat" hackers. (The faceless team of engineers [[Randall]] describes). At any time, these people could quit, leaving devices defenseless.

The graph shows the various cases of how well things go on the y axis, compared to how long it has been owned on the x axis. The older a device/software is, the less likely it is to consistently receive security updates for protection, so they are more likely to be hacked, even in the best case. After 10 years, the device/software, is most likely outdated and is not being used anymore. Companies then no longer find it profitable to continually update the product, and then pull support out, even if people are still using it, leaving them vulnerable. The exact thing happened to many users, when Microsoft halted updates to Windows XP in 2014, even though many people still used the operating system.

==Transcript==
:[A graph is shown inside a frame. There is one dotted line going from the middle of the left edge, then dipping slightly before rising slowly at first, then more rapid and finally slowing its ascend down as it nears the top right corner.]

:[Above the frame is the title of the x-axis, and from each end of this text, there is a small line going out and then down, to indicate a time range, which is shown below with four times:]
:How long you've had your smart appliance
:6 months     1 year     5 years     10 years

:[Along the left part of the frame there runs a double arrow and at the top and bottom of these arrows there are legends at the top and bottom of the panels height:]
:Best-case
:Worst-case

:[Inside the panel there is text above the dotted line to the right, and below the dotted line to the left:]
:You're constantly being rescued from peril by a faceless team of engineers who could wander away at any time

:Your appliance is part of a botnet run by organized crime

{{comic discussion}}

[[Category:Line graphs]]
[[Category:Virtual Assistants]]