explain xkcd - User contributions [en]

Talk:1137: RTL

2012-11-21T09:17:43Z

89.177.52.2:

There's a typo in the comic - hte should be eht for "the" spelled backwards -jars99

Acutally, unicode 202e doesn't "flip proceeding text back-to-front", it overrides the direction, setting it to "right-to-left" for the following text. It's back-to-front for most of us like "left-to-right" is to other writing systems. I know it's nitpicking, but xkcd readers should appreciate the symmetry. [[User:BKA|BKA]] ([[User talk:BKA|talk]]) 07:23, 21 November 2012 (UTC)

I don't see the reversed title. My window manager is not UTF-8 compatible, so when a window title is set to string containing UTF-8 characters, it doesn't change. This brings the question if it really is a browser problem or if the browsers behave as expected and the window manager is at fault. -- [[Special:Contributions/89.177.52.2|89.177.52.2]] 09:17, 21 November 2012 (UTC)

Talk:1137: RTL

2012-11-21T09:17:09Z

89.177.52.2:

There's a typo in the comic - hte should be eht for "the" spelled backwards -jars99

Acutally, unicode 202e doesn't "flip proceeding text back-to-front", it overrides the direction, setting it to "right-to-left" for the following text. It's back-to-front for most of us like "left-to-right" is to other writing systems. I know it's nitpicking, but xkcd readers should appreciate the symmetry. [[User:BKA|BKA]] ([[User talk:BKA|talk]]) 07:23, 21 November 2012 (UTC)

I don't see the reversed title. My window manager is not UTF-8 compatible, so when a window title is set to string containing UTF-8 characters, it doesn't change. This brings the question if it really is problem or if the browsers behave as expected. -- [[Special:Contributions/89.177.52.2|89.177.52.2]] 09:17, 21 November 2012 (UTC)

Talk:1119: Undoing

2012-10-12T08:19:17Z

89.177.52.2:

Perhaps his motivation is to restore natural wind patterns to the environment. I remember reading about the ecological impact of wind power includes lessened wind currents. Some organisms rely on the wind to propagate the species, such as winds that blow seeds or how some spiders "parachute" on wind currents. Or it could be that he just likes to mess with people. --[[User:Joehammer79|Joehammer79]] ([[User talk:Joehammer79|talk]]) 13:46, 10 October 2012 (UTC)

:I always though that if you put a forest of windmills on top of hill the damage of ecosystem done by the building is enough. Adding the fact about wind used for propagating ... damn, windmills are almost as unecological as solar plants on fields ...
:Seriously, how can anyone who things ecologically be AGAINST nuclear power? -- [[Special:Contributions/89.177.52.2|89.177.52.2]] 08:19, 12 October 2012 (UTC)

At first I thought this should be more of a Blackhat trick, but since he seems to think he is creating good in the world by restoring, it makes sense that it is Cueball--[[Special:Contributions/70.166.209.171|70.166.209.171]] 14:35, 10 October 2012 (UTC)

Am I the only one who is also entertaining the possibility that the fan setup in the picture is not acting with, but rather counteracting the wind, which is turning the windmill that supplies it power? I understand that the alt-text makes it seem like Munroe's thinking about 'making up' for our interference with insolation (and presumably wind, water etc.) patterns. But, if we're going to bring in logic here, EVERYTHING falls apart :D I had a little fun trying to model what kind of a dynamic equilibrium the hitherto described windmill-fan arrangement would settle into. [[Special:Contributions/123.238.25.42|123.238.25.42]] 17:13, 10 October 2012 (UTC)

:Indeed, the first thing that comes to mind is the "fan blowing into the sails" arrangement you sometimes see in cartoons, but I don't think that's what's going on here.[[User:CityZen|CityZen]] ([[User talk:CityZen|talk]]) 17:58, 10 October 2012 (UTC)

It's even more fun to do to condoms.
--[[User:SuspendedPhan|SuspendedPhan]] ([[User talk:SuspendedPhan|talk]]) 18:50, 10 October 2012 (UTC)

:What the hell is "rotational" energy?!

Talk:1116: Traffic Lights

2012-10-05T08:04:10Z

89.177.52.2: /* Red and yellow */

I doubt that this comic carries any deeper meaning. [[Special:Contributions/108.233.253.211|108.233.253.211]] 16:29, 4 October 2012 (UTC)

Traffic signals really are one of the most inscrutable inventions to ever be made. I mean, red means stop, yellow means caution, green means go. Unless you're in a turn lane, which means you have to watch for the green arrow, if there is one, or wait for an opening. Unless you're turning right, which is permitted to turn at any time providing there aren't any cars. Unless there's a sign that says "No Right Turn On Red". There's also the crazy cities that have special right turn lights. Then there's the intersections that have a sign for each lane telling what can and cannot be done. Or, if you're really lucky one of those intersections that has the LED screen that dynamically changes what the lane can and cannot do. And to top it all off, the Colorado Department of Transportation (as well as a few other states I'm sure) are testing out a 4-stage left turn light to increase the safety of drivers. [https://www.auroragov.org/cs/groups/public/documents/document/003604.pdf] Yes, you read that pamphlet correctly. There is a special 4th light, just to blink yellow, because you couldn't just make the yellow light blink, like it does anyway after 9pm. No. There has to be a whole special light that indicates when a left-turn-er must use special caution to turn.

Nope. I'm done driving. Bring on the self-driving cars, people are officially idiots. [[User:Lcarsos|lcarsos]] ([[User talk:Lcarsos|talk]]) 16:52, 4 October 2012 (UTC)
: There is a problem with a blinking yellow arrow. Blinking yellow is already used. It means you have the right of way, but the other direction may proceed as well. What is wanted here is blinking red, which means that you stop, but may proceed, as someone else has the right of way. As for adding a fourth light, this just confuses things even more, particularly with respect to color blind individuals. Having said that, Virginia's variant is to have lights with both left arrows and solid greens. If it is green arrow, you have the right of way, while solid green means the other direction also has a green. There is almost always a sign reading "left turn yield on <solid-green-circle>" [[User:Divad27182|Divad27182]] ([[User talk:Divad27182|talk]]) 18:19, 4 October 2012 (UTC)

::so the blinking yellow left arrow generally means the same as a round green light - you can go when it's clear, but the opposite traffic has a green light too. I love this idea because a lot of the time where there is a separate left-turn signal, there are advanced lefts for both ways, and then left turners get a red left arrow and have to stop while people going straight get a green - so even where there's no oncoming traffic, you can't turn. this way, you just lose your "advance" status and go back to the regular rule of "turn if you can, otherwise you end up turning as the lights go yellow"

::I think what Lcarsos is pointing out if you check the PDF link, is that the new left-turn lane has 4 lights, all of which are left-arrow shaped. Thus, his point is why couldn't they make the 2nd light (yellow left arrow) blink, instead of installing a third light which is also a yellow left arrow whose job is to blink?

::I can think of a few possible reasons - first, perhaps an all-blinking light has different bulbs which are more efficient for blinking and won't burn out as much; second, because they want to distinguish between the two lights more strongly (i.e. if you glance over between blinks, you don't have to wait a moment to see if it will blink - if you see the 3rd light up, you know it's going to blink without waiting for it to actually blink); similarly, I suppose there could be colour blindness issues where they want to make it clear which light is which.

::PS: Right on Red is more common in north america than other places, but even here there are a few exceptions that do not allow right turns on red lights. New York City is one. Montreal is another. Most of Mexio is a third. [[User:TheHYPO|TheHYPO]] ([[User talk:TheHYPO|talk]]) 21:19, 4 October 2012 (UTC)

Hmm... not one to do the actual analysis, I still wonder whether there could be some message encoded in the pattern of lights -- in binary ASCII, baudot, Morse, or something. Hmm... [[Special:Contributions/208.54.40.227|208.54.40.227]] 19:12, 4 October 2012 (UTC)

=== Red and yellow ===

In Poland you can sometimes stumble upon '''red and yellow''' -- while yellow alone means that there shortly would be a red, and you can proceed if you are at or almost at crossing, but stop otherwise, red and yellow is to mean that there shortly would be green (go), and to prepare oneself. But it is quite rare. [[User:JakubNarebski|JakubNarebski]] ([[User talk:JakubNarebski|talk]]) 06:45, 5 October 2012 (UTC)

:In Germany all traffic lights behave this way. [[User:Joha.ma|Joha.ma]] ([[User talk:Joha.ma|talk]]) 07:45, 5 October 2012 (UTC)

::At least some lights in Czech behave this way too. -- [[Special:Contributions/89.177.52.2|89.177.52.2]] 08:04, 5 October 2012 (UTC)

== Obvious ==

It's how traffic engineers troll you when you are going the wrong way on a one-way. Learn to read signs!

Talk:1114: Metallurgy

2012-09-28T10:42:28Z

89.177.52.2:

"extraterrestrial metal was often more refined and plentiful than man-made metal ingots." -I'd love to read about this. Citation needed! --[[User:Buggz|Buggz]] ([[User talk:Buggz|talk]]) 08:59, 28 September 2012 (UTC)
:Sure. Wikipedia. https://en.wikipedia.org/wiki/Iron_meteorite. It was mostly cultures with little industry picking up meteorites and finding that the stuff lying on the ground was miles better than the awful fragile metal that they were making from rocks. [[User:Davidy22|Davidy22]] ([[User talk:Davidy22|talk]]) 09:06, 28 September 2012 (UTC)

In fantasy stories, the world is usually much more complicated place. Meteorite, which may have easily traveled billions kilometres going through places with environment greatly different from anything available on the planet, can easily develop interresting properties. Still, for every super-cool super-effective sword, there must be many other meteorites whose properties make them LESS usefull for weapons.
Even in our universe, meteorites may went through temperatures and magnetical fields much greater that available for preindustrial civilization. -- [[Special:Contributions/89.177.52.2|89.177.52.2]] 10:42, 28 September 2012 (UTC)

Talk:1095: Crazy Straws

2012-08-17T09:36:53Z

89.177.52.2:

Compare [[915:_Connoisseur|xkcd.com/915]]. [[User:Arlo James Barnes|Arlo James Barnes]] ([[User talk:Arlo James Barnes|talk]]) 10:06, 15 August 2012 (UTC)

*"Subcultures" is misspelled in the comic. Perhaps Randall will fix it and reupload? [[User:Erenan|Erenan]] ([[User talk:Erenan|talk]]) 15:17, 15 August 2012 (UTC)
:Randall has corrected the mistake, but the image on this page is still the old one. Would we want to keep both versions of the image in the interest of completeness? [[User:Erenan|Erenan]] ([[User talk:Erenan|talk]]) 00:02, 16 August 2012 (UTC)

* Have to admit, this one went a bit over my head. [[User:TheHYPO|TheHYPO]] ([[User talk:TheHYPO|talk]]) 20:38, 15 August 2012 (UTC)

*Fractals not only have an unlimited level of detail; they are (most times) self-similar in the sense that you'll find the same pattern on every level of detail. Just like finding the equivalent of finding the "Paris hilton of the plastic straw subcultures' hobbyists' splinter group." [[User:BKA|BKA]] ([[User talk:BKA|talk]]) 09:06, 16 August 2012 (UTC)

*I think we should get the corrected comic, but note that it was originally misspelled in the explanation. Tebow Time, Twice a Day. 17:19, 16 August 2012 (UTC) ([[User talk:jjhuddle|talk]])

*It's a mistake to think the every-pickier level of detail is a flaw in these interest subcultures. Smaller and smaller levels of study are what flesh out our knowledge of the world. And myriad small subgroups of shared interests allow many people to achieve excellence and status, not just in their minds but in an (admittedly small) range of reality. Examples: the people who maintain and improve the Kennedy line of Boston Terriers; people whose specialty is tooth wear in prehuman hominids; people who parse xkcd comics.

* I don't think that the comic means it as a flaw, I think it's a just a (humourous) observation, not a negative critisism.

* Agreed, and it even goes on here (just drop in on the community portal, to see tempests in a tea pot such as whether he's [[Cueball]] or [[Rob]]...) I couldn't help but think that RM poked his head in on this site and came up with this comic as a response. (Of course, that would be greatly overestimating our importance in the grand scheme of things, but we are all entitled to our little fantasies of grandeur, no?) Ah, well... it seemed perfect timing nonetheless. '''By the way, folks: please sign your posts.''' Four tildes, a la <nowiki>~~~~</nowiki>, is all it takes... -- [[User:IronyChef|IronyChef]] ([[User talk:IronyChef|talk]]) 14:30, 16 August 2012 (UTC)

* I don't think the fractal analogy holds because human subcultures cannot be nested infinitely deep. At some point, subcultures will come down to individual humans, who aren't also (infinitely deep) subcultures. [[Special:Contributions/70.31.155.184|70.31.155.184]] 15:06, 16 August 2012 (UTC)
** Randall is using the term hyperbolically — his point is that subcultures have ludicrous amounts of detail, not necessarily infinite. [[Special:Contributions/108.233.253.211|108.233.253.211]] 18:26, 16 August 2012 (UTC)
*** Half of me disagrees with you, with the other half in an argument with itself over from which crazy straw will Paris Hilton look best drinking. [[Special:Contributions/146.186.149.47|146.186.149.47]] 18:49, 16 August 2012 (UTC)
**** Still, even people so crazy they are kept in straitjacket all the time can have only several dozens of personalities ... there's not enough space in brain for infinite. -- [[Special:Contributions/89.177.52.2|89.177.52.2]] 09:36, 17 August 2012 (UTC)
** I still believe Randall's point was not the infinite detail, but self-similarity. Regardless on whether you look at something very popular or a niche - you'll always find exactly the same social structures. [[User:BKA|BKA]] ([[User talk:BKA|talk]]) 06:05, 17 August 2012 (UTC)

1096: Clinically Studied Ingredient

2012-08-17T09:30:06Z

89.177.52.2: /* Explanation */ Being ineffective isn't the WORST conclusion of study

{{comic
| number = 1096
| date = August 17, 2012
| title = Clinically Studied Ingredient
| image = Clinically Studied Ingredient.png
| titletext = Blatantly banking on customers not understanding that it's like a Hollywood studio advertising that their new movie was 'watched by Roger Ebert'.
| imagesize =
}}

==Explanation==
This comic is poking fun at a phrase which some ads use to boost sales of their product. They state that their product contains a "clinically studied ingredient", which consumers assume means that the product itself has been clinically tested and proven. However, the phrase is very ambiguous. Firstly, only a single ingredient has necessarily been studied, not the combined effect of all the ingredients in the product (which can produce drastically different effects). Secondly, the phrase just states an ingredient was clinically studied, and doesn't mention the findings of that study (which, for all we know, could have found the ingredient to be ineffective or harmfull). In other words, the phrase is used in shrewd marketing techniques.

In the comic, [[Megan]] is stating how she's been tested. However, she doesn't state what she was tested for. While we can assume that Cueball was asking about {{w|STD}} tests, Megan could just as easily be referring to having been tested for something else, such as a blood pressure test.

In the title text, {{w|Roger Ebert}} is a famous film critic. However, we can expect most big name movies to be watched by him. Simply stating that he saw a movie doesn't necessarily mean that he liked it.

{{Comic discussion}}