explain xkcd - User contributions [en]

978: Citogenesis

2021-04-12T02:10:37Z

141.101.104.135:

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1519: Venus

2015-05-01T07:07:33Z

141.101.104.135: /* Transcript */

{{comic
| number = 1519
| date = May 1, 2015
| title = Venus
| image = venus.png
| titletext = The sudden introduction of Venusian flowers led to an explosive growth of unusual Earth pollinators, which became known as the "butterfly effect."
}}

==Explanation==
{{incomplete}}

==Transcript==
{{incomplete transcript}}
Ponytail: Venus once was temperate. It had seas and rivers, and venusians cultivated vast fields of beautiful flowers.

Ponytail: Until their greenhouses fled the planet due tot he runaway greenhouse effect.

Ponytail: The venusians pursued their greenhouses to earth, settling in the Netherlands and kickstarting the Dutch floral industry. Any questions?

Offscreen: Beacause you're retering in a month, do you just not care what you say anymore?

Ponytail: What?! I '''ride the skies''' atop a screaming bird of truth! Also, yes I do not.

{{comic discussion}}

1519: Venus

2015-05-01T07:05:32Z

141.101.104.135: added transcript

{{comic
| number = 1519
| date = May 1, 2015
| title = Venus
| image = venus.png
| titletext = The sudden introduction of Venusian flowers led to an explosive growth of unusual Earth pollinators, which became known as the "butterfly effect."
}}

==Explanation==
{{incomplete}}

==Transcript==
{{incomplete transcript}}
Ponytail: Venus once was temperate. It had seas and rivers, and venusians cultivated vast fields of beautiful flowers.
Ponytail: Until their greenhouses fled the planet due tot he runaway greenhouse effect
Ponytail: The venusians pursued their greenhouses to earth, settling in Te Netherlands and kickstarting the Dutch floral industry. Any questions?
someone else: Beacause you're retering in a month, do you just not care what you say anymore?
Ponytail: What?! I '''ride the skies''' atop a screaming bird, of truth! Also, yes I do not.

{{comic discussion}}

1497: New Products

2015-03-11T07:04:01Z

141.101.104.135: /* Explanation */

{{comic
| number = 1497
| date = March 11, 2015
| title = New Products
| image = new products.png
| titletext = If you ever hear "Wait, is that Kim Dotcom's new project? I'm really excited about it and already signed up, although I'm a little nervous about whether everyone should hand over control of their medical...", it's time to dig a bunker in your backyard.
}}

== Explanation ==

{{incomplete|First draft.}}

This comic points out an apparent paradox in product performance: Many products that are criticized when first announced go on to great success, and many that are heavily hyped are total flops.

#*A product that "doesn't do anything new" may still be successful for a variety of reasons. It may in fact do something new that the engineers and programmers are overlooking, or it may simply be a better presentation of an older idea. This latter category is the completion of the life-cycle mentioned later in the comic, those products whose "ideas will show up in something successful."
#*If engineers and programmers can't figure out why anyone would want a product, that may actually be because the applications are highly avant-garde or niche.
# Products that are "really exciting" to engineers and programmers, so much so that they have already preördered them, can turn out to be "nerd bait," so to speak. The developers promise a cool, groundbreaking new gadget or service, and people get so excited by the idea that they ignore whether or not it's actually feasible. When the developers can't follow through, unsurprisingly, the product flops. The ideas that it proposed, which were so intriguing to the programmers and the developers, will be worth billions once someone can figure out how to realize them.
# If a product's developer's name is well-known among engineers and programmers, but not among the general public, that's usually not a good sign. Quite likely, the developer is someone who goes a step farther than those in the previous category, not just announcing something cool and exciting they can't follow through on, but doing so ''knowing'' that they can't follow through, and take people's money anyways. The state may press criminal charges against them (for fraud or such), or the angry investors may sue to get their money back.
# If engineers' and programmers' only objection is that they don't like the company behind the product, that's basically a tacit admission that there's nothing else wrong with it. For the average consumer, the perks of a groundbreaking new product outweigh whatever problems people may have with the company behind it.

The title text imagines a product that fits into the second, third, and fourth categories. ({{w|Kim Dotcom}} is a controversial entrepreneur and convicted criminal, who at this point fights his extradition to the United States.) According to this chart, such a product would a) flop, b) turn out to be a scam, and c) somehow still wind up in control of whatever it wants to control. This does not sound good, and may even suggest the rise of some sort of malicious AI (how else would a product take control of your medical records despite having been a flop?). Thus the suggestion to dig a bunker.

== Transcript ==

:Predicting the success or failure of a new product
:Based on what engineers and programmers are saying about it
:[A two-column table illustrating this. The words "if they say..." and "it means..." are the headers to the two columns; below, they are reprinted before the transciption of each row, for clarity's sake.]
::If they say...
:::"It doesn't do anything new"
:::"Why would anyone want that?"
::It means...
:::The product will be a gigantic success.
::If they say...
:::"Really exciting"
:::"I've already preordered one"
::It means...
:::The product will be a flop. Years later, its ideas will show up in something successful.
::If they say...
:::"Wait, are you talking about <unfamiliar person's name>'s new project?"
::It means...
:::The product could be a scam and may result in arrests or lawsuits.
::If they say...
:::"I would never put <company> in charge of managing my <whatever>"
::It means...
:::Within five years, they will.

== Trivia ==
* There is a typo on the first upload. "Preorded" should be "preordered".

{{comic discussion}}

Talk:1474: Screws

2015-01-17T23:34:53Z

141.101.104.135:

This page is now on the first page of google for "uranium screw". [[User:Mrmakeit|Mrmakeit]] ([[User talk:Mrmakeit|talk]]) 05:31, 16 January 2015 (UTC)
:And as of now, this page is the #1 result for "uranium screw". The second is the xkcd fora thread on this comic, and the third is our home page. [[User:NealCruco|NealCruco]] ([[User talk:NealCruco|talk]]) 16:47, 16 January 2015 (UTC)

I don't think that patent is the right one, it seems to describe a uranium decontamination procedure, not a screw made of uranium like in the comic. [[User:LeoDeQuirm|LeoDeQuirm]] ([[User talk:LeoDeQuirm|talk]]) 05:46, 16 January 2015 (UTC)

I'm pretty sure the "uranium screw" is just a reference to the fact that the head of the screw appears to have split in two ("fissioned"), as opposed to a normal flat head screw that still has the edges connected. [[User:Sam887|Sam887]] ([[User talk:Sam887|talk]]) 05:50, 16 January 2015 (UTC)

Just a shot in the dark here, but a company that sells uranium ore and radiological equipment happens to also sell screws for one of its Geigers that look just like the screw cross-section in the comic. [http://www.uraniumrocks.com/products/replacement-circuit-board-mount-screws-for-victoreen-cdv-700-short] [[User:Conqu2|Conqu2]] ([[User talk:Conqu2|talk]]) 06:01, 16 January 2015 (UTC)

I was wondering if the "uranium screw" was referring to the Demon Core -- two hemispherical domes that Louis Slotin was holding apart with a screwdriver. Then I remembered the Demon Core was plutonium, not uranium. [[Special:Contributions/173.245.48.119|173.245.48.119]] 06:49, 16 January 2015 (UTC)

There are ferrous alloys containing (depleted, of course ;-) uranium for "increase[d] toughness and strength". [http://en.wikipedia.org/wiki/Ferrouranium] [[User:Knob creek|Knob creek]] ([[User talk:Knob creek|talk]]) 09:21, 16 January 2015 (UTC)

I think the be was going for apple's pentalobe screw with the 5 pointed star {{unsigned ip|108.162.238.162}}

I don't think the uranium screws are named for their use in stuff to do with uranium, as I have both seen and used screws that look like that before. It's basically a flat head screw whose divot extends all the way across the face of the screw. I agree more with the previous commentor who notes that the screw looks like it has fissioned. [[Special:Contributions/108.162.237.182|108.162.237.182]] 06:34, 16 January 2015 (UTC)

An actual rivet is neither a screw nor a bolt; it's a fastener that is placed and then has one end plastically deformed -- traditionally by a rivet gun, but more often in smaller sizes by some sort of press or clamp. (Pop rivets are hollow, and are deformed by pulling a cone-sheaped wedge into the open end of the hollow core.) There's no way to remove one except to destroy it (drill it out or cut one end off). The item pictured could also be the head of a carriage bolt, but that's no help if you can't get at the other end of the bolt. Randall is slightly pessemistic, though: there *are* some "security" screws and bolts that use a slightly-elliptical domed head that's hard to tell from a rivet; they can be unscrewed, but only with a matching slightly-elliptical socket. [[Special:Contributions/199.27.133.70|199.27.133.70]] 06:35, 16 January 2015 (UTC)

All of which can be removed by a sonic screwdriver. Totally a real thing. {{unsigned ip|173.245.50.86}}

Could the "cursed -1" be a Nethack reference? I don't know if Dungeons and Dragons has the "blessed/uncursed/cursed" status, but in Nethack cursed items with negative enchantments (denoted "cursed -whatever") are a pretty common occurrence. [[Special:Contributions/199.27.133.25|199.27.133.25]] 07:31, 16 January 2015 (UTC)

In Nethack, Cursed objects cannot be removed. Seems appropriate. At first I thought it was a pozidrive screw head. Posts on the fission screw head: where have you seen screws whose divot does *not* extend across the head? {{unsigned ip|199.27.128.230}}

[[User:Kreuiter|Kreuiter]] ([[User talk:Kreuiter|talk]]) 08:03, 16 January 2015 (UTC)from wikipedia: Louis Philippe Joseph d'Orléans (13 April 1747 – 6 November 1793) commonly known as Philippe, was a member of a cadet branch of the House of Bourbon, the ruling dynasty of France. He actively supported the French Revolution and adopted the name Philippe Égalité, but was nonetheless guillotined during the Reign of Terror

I don't think it is specifically a reference to Nethack as a lot of ol games (both video and tabletop) use the mechanic of non removable cursed objects. It is common enough in my opinion that we could argue about until we are blue in the face and get nowhere. {{unsigned ip|108.162.237.193}}

uranium screw may be a reference to [http://en.wikipedia.org/wiki/Louis_Slotin#Criticality_accident Louis Slotin], who died when he was using a screw driver to seperate two halves of a plutonium sphere as part of a science demonstration, and triggered a large burst of radiation when his hand slipped.
--[[Special:Contributions/108.162.216.59|108.162.216.59]] 08:28, 16 January 2015 (UTC)

I'm thinking it might benefit the article to include a place in the wikitable for the correct term for each drive socket. Of course their are not correct terms for each of them. Not to mention rivets and Phillip's heads don't even have drive sockets. [[Special:Contributions/173.245.56.189|173.245.56.189]] 09:04, 16 January 2015 (UTC)BLuDgeons

If you suggest cursed-1 is because if misuse - I in first place thought of [http://en.wikipedia.org/wiki/List_of_screw_drives#Pozidriv] as the cursed one - because Philipps and Pozidriv are slightly incompatible and causes damage. [[Special:Contributions/108.162.254.18|108.162.254.18]] 09:09, 16 January 2015 (UTC)

:+1, the cursed one looked to me like pozidriv at the first glance, and it's really cursed as interchanging them leads to damage ... And the most fun is when you get some Chinese crap that looks like pozidriv but it doesn't fit so you use philips which doesn't quite fit too but at least it can be inserted and you end up damaging both the driver and the screw :-/ --kavol, [[Special:Contributions/108.162.254.96|108.162.254.96]] 10:02, 16 January 2015 (UTC)

Is it really true that Phillips head are 'commonly used in construction'? At least in Europe they were replaced by Pozidriv in the 1990's and these days by Torx. {{unsigned|Popup}}
:As a former (late 2000s to 2012, pre-college) construction worker in California, Texas, and Oklahoma, yes. Philips are very common in construction here. [[Special:Contributions/108.162.221.243|108.162.221.243]] 06:08, 17 January 2015 (UTC)

Maybe this depends on the quality of the product? If i look around, i find lots of products held together by phillips screws and only a few (usually more hi-tech and expensive) one with torx screws. [[User:Knob creek|Knob creek]] ([[User talk:Knob creek|talk]]) 09:28, 16 January 2015 (UTC)

:er, what do you call "a product"? - If "construction" is mentioned, I imagine things like wooden skeleton of a roof, fastening of windows/doors, self-tapping screws, wallplug screws ... and it's almost 100% pozidriv and torx here in central Europe. ("Almost" accounts for imports by non-european companies.) If I imagine metal constructions, from racks to bridges, hex and inbus (= hex slot) prevail. --kavol, [[Special:Contributions/108.162.254.96|108.162.254.96]] 10:02, 16 January 2015 (UTC)

:: Granted I'm not in the construction trade, and I'm in UK rather than continental Europe, but I have never seen Torx used in construction. In my experience, the majority is Pozi, and the rest is Phillips. --[[User:Pudder|Pudder]] ([[User talk:Pudder|talk]]) 13:06, 16 January 2015 (UTC)

Perhaps a reference to http://xkcd.com/927/ - Standards? [[Special:Contributions/141.101.79.61|141.101.79.61]]

Phillips screws have a larger number for larger size, not smaller. {{unsigned ip|108.162.216.35}}

I'm surprised Randall didn't include square/Robertson screws/drivers. Just as bad as hex-recess, but when you actually USE them they are great! Combination Robertson-Phillips are good too but rarer. And do NOT get me started about the untold types of tamper-proof designs... --BigMal // [[Special:Contributions/108.162.216.209|108.162.216.209]] 13:06, 16 January 2015 (UTC)
:The most awkward, I find, are star-shaped (5/6-pointer) screws with a central 'post' that requires a hole-ended screwdriver-bit of the appropriate shape to be used (may also aid in positive positioning of the tool, but not much more than normally so SFAICT it's just there to be awkward without the right tools by manufacturer-mandated professionals). Luckily, I've ''got'' screwdriver-heads for just about every conceivable 'uncursed' screwhead (48 different types and sizes in one handy kit alone, not even counting socket-heads and 'cursed' screw drilling-outers). Especially good for laptop repair, to get around deliberately proprietry systems with small and (deliberately) akward screws; as opposed to bicycle repair, which I'm sure is usually for the stated practical torque reasons. [[Special:Contributions/141.101.98.247|141.101.98.247]] 13:59, 16 January 2015 (UTC)

"cursed -1 <something>" is definitely a standard NetHack item description format, but it applies to D&D too. In general, "cursed" means you cannot remove the item, and the number is describing the item's effectiveness compared to a standard (+0) version of the item. In this case, both can be appropriate: "cursed" because -as noted- you cannot remove it in the normal way. "-1" probably comes from being unable to tighten the screw far enough to fully satisfy its purpose: maybe the joint is slightly loose, or the head of the screw is left slightly protruding, so that it easily catches on other things.
[[Special:Contributions/141.101.80.80|141.101.80.80]] 13:28, 16 January 2015 (UTC)

Rather than two (still) separate fissile hemispheres, that 'gap' is obviously a continuation of material around the back of a schematic cross-section of a whole sphere with a core currently missing. I think the fissile plug will be inserted/fired at the required juncture to fill this, from the side. Very like the device in the film The Fifth Protocol, for easy cinematic reference of the concept. (Noting that 'gun-type' nuclear devices tend to fire the 'enclosing' larger subcritical mass, spheroidal or cylindrical ''onto'' the smaller and fixed 'plug' to fill the gap between it and the surrounding neutron reflector jacket. For several very good reasons. Thus that sphere would be shoved onto the currently missing 'core', although it makes the reflector assembly and positioning a bit more complex as well, compared with a cylindrical sleeve.) [[Special:Contributions/141.101.98.247|141.101.98.247]] 13:49, 16 January 2015 (UTC)

The Cursed -1 Phillips Head is much more likely to be a [http://en.wikipedia.org/wiki/List_of_screw_drives#Pozidriv Pozidriv] head than a worn Philips head. The cursed -1 implication if used with a Philips driver is certainly deserved. [[Special:Contributions/141.101.106.101|141.101.106.101]] 14:59, 16 January 2015 (UTC)

Re: Uranium Screw... see http://www.google.com/patents/US20060088457{{unsigned ip|108.162.219.97}}

Uranium screws were used in the assembly of the Fat Man nuclear bomb. All parts of the tamper were made with natural uranium, including the screws and hinges:
http://blog.nuclearsecrecy.com/2014/11/10/fat-mans-uranium/
[[User:Rocbolt|Rocbolt]] ([[User talk:Rocbolt|talk]]) 15:34, 16 January 2015 (UTC)rocbolt

[[User:Rocbolt]] has it right. It's not a metaphor or a joke. https://www.google.com/search?q=%22uranium%20screws%22%20%2dxkcd [[User:Pesthouse|Pesthouse]] ([[User talk:Pesthouse|talk]]) 15:41, 16 January 2015 (UTC)

Did anyone notice that the "shortcut icon" of the page was changed together with this comic? Its sort of blurred: http://i.imgur.com/ArEbL5r.jpg?1 compared to the original image http://xkcd.com/s/919f27.ico {{unsigned ip|141.101.80.4}}

Possibly a reference to Apple's iPhone "tamper-resistant" screws http://en.wikipedia.org/wiki/Pentalobe_screw [[Special:Contributions/188.114.98.252|188.114.98.252]] 17:38, 16 January 2015 (UTC)

Screws made of uranium were used to hold the tamper plug of the fissile core of the Trinity nuclear device together. I think that's what "Uranium Screw" refers to, and why the screw is radiating: it is radioactive. [[User:Arnold Chiari II|Arnold Chiari II]] ([[User talk:Arnold Chiari II|talk]]) 15:35, 16 January 2015 (UTC)

Not sure why the page says depleted Uranium. I think they were natural uranium, which is radioactive. Rocbolt's reference supports this [[User:Arnold Chiari II|Arnold Chiari II]] ([[User talk:Arnold Chiari II|talk]]) 21:26, 16 January 2015 (UTC)

Depleted uranium is nearly pure U-238, which '''is''' radioactive, but has a half-life 6X longer than U-235.

Technically, a rivet '''is''' a bolt, but the usage of ''bolt'' to refer to a non-threaded object with a head is archaic.

I have seen a few objects that look like "flat head", where the slot doesn't extend all the way out to the edge, but precious few, compared to the fairly common "standard" woodscrew, where the slot goes all the way to the edge, as shown at "uranium screw".

I thought "Cursed -1" was a clever double reference to the common RPG meme and to what happens after someone has confounded Philips, Pozidriv, or Reed and Prince with one of the others and the fireworks from using a tool designed for one on a screw of another type.--[[Special:Contributions/199.27.128.197|199.27.128.197]] 00:32, 17 January 2015 (UTC)

Could the Amazon one be a reference to star ratings? --[[Special:Contributions/108.162.221.167|108.162.221.167]] 01:58, 17 January 2015 (UTC)

My thoughts exactly. And another thing: the slot of the flathead doesn't go "through" because this makes for a visual +/- gag. [[Special:Contributions/108.162.230.221|108.162.230.221]] 20:22, 17 January 2015 (UTC)

The rivet could also be a nail. While a nail isn't a screw, neither is a rivet. [[User:Glen442|Glen442]] ([[User talk:Glen442|talk]]) 03:20, 17 January 2015 (UTC)

I think the bit about "Phillip's Head" is an obvious note about the frustration of dealing with different screw types -- as in "I'm so frustrated dealing with all these screw types I'm going to find the inventor of the Phillips head screw and chop his head off!" {{unsigned ip|199.27.133.137}}

Shouldn't that be 'an allen key' and not a wrench? I'm willing to acknowledge the inventor (Allen) but it's a key, not a wrench, by any definition. [[Special:Contributions/141.101.104.135|141.101.104.135]] 23:34, 17 January 2015 (UTC)