explain xkcd - User contributions [en]

3074: Push Notifications

2025-04-09T21:05:46Z

172.71.102.143: Just got a new sword picture!

{{comic
| number = 3074
| date = April 9, 2025
| title = Push Notifications
| image = push_notifications_2x.png
| imagesize = 277x347px
| noexpand = true
| titletext = NOTIFICATION: Now dismissing a head of the Notification Hydra… NOTIFICATION: Success! You have dismissed a head of the Notification Hydra!
}}* To experience the interactivity, visit the [https://xkcd.com/3074/ original comic].

==Explanation==
{{incomplete|Created by a DELAYED BOT - Please write an introductory paragraph and explain other functions of the comic. Do NOT delete this tag too soon.}}
If you press silence notifications too much the laptop blows up

Notification types include:
* A few starter notifications about this comic, the successful sending of a notification of this comic, and the lack of another comic.
* A "streak" notification counting the number of times you've clicked it.
* A "have you seen my cat?" notification which spawns several clickable cats on the comic.
* Cat fact notifications that appear when a cat is clicked.
* A "gravity malfunction" indicating a change of the image.
* "Zoom notifications" including numeric coordinates.

Comic images include:
* Cueball sitting at his desk, with his laptop.
* Cueball sitting at his desk, with a small potted plant.
* Cueball sitting at his desk, with a much larger plant that has clearly outgrown the pot, at least vertically.
* Cueball sitting at his desk, with a cat in the foreground near the point of view.
* Cueball, the desk, and the laptop floating.
* Cueball sitting on the desk, facing the laptop on the chair.
* The desk vacant with "Game Over" displayed if you use the emergency stop.
* Cueball sitting on the desk, with a sword leaning against the desk.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}
:[Cueball sits at a desk in an office chair. He is typing on a computer.]
:[Gray message box with a small circled “x” at the top right corner:]
:Happy April 1st (observed)!
:To celebrate, we were excited to introduce a new xkcd.com feature: push notifications for new comics!
:Unfortunately, this feature has gone horribly wrong.
:Until further notice, we are asking people ''NOT'' to sign up for new comic notifications.
:Frankly, we recommend not even clicking on any notifications to learn more.
:''Click this notification to learn more!'' (a circled arrow is shown)

:“Push notifications for new comics” sounds like a simple feature, right?
:There’s a nice API for browser notifications. xkcd updates three times a week.
:So you just send a notification for each update, right?
:That’s what we thought, too.
:''Click to continue!'' (a circled arrow is shown)

{{comic discussion}}[[Category:Interactive comics]]

Talk:2854: Date Line

2023-11-15T08:42:52Z

172.71.102.143:

The 'standard' and '2x' sized images had unexpected sizes, so a Trivia section has been automatically generated, and an imagesize parameter has been added (at half size) to render the image consistently with other comics on this website. --[[User:TheusafBOT|TheusafBOT]] ([[User talk:TheusafBOT|talk]]) 22:56, 13 November 2023 (UTC)

Is it just me or are these size errors becoming more common? What going wrong in the infra?
[[Special:Contributions/172.69.62.90|172.69.62.90]] 22:57, 13 November 2023 (UTC)

:Yeah, and this one came in HUGE. The image size upon loading the comic at xkcd.com was 6642x7838. At first, I thought it was a special comic or an interactive one. But just huge. [[User:Orion205|Orion205]] ([[User talk:Orion205|talk]]) 00:25, 14 November 2023 (UTC)

added an explanation [[Special:Contributions/172.70.174.61|172.70.174.61]] 23:49, 13 November 2023 (UTC)

The IDL might not normally be straight, but when the rocket pulls in it, it will straighten it out. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:54, 14 November 2023 (UTC)

The Kentucky State Police resent the implication about their organizational infrastructure.

I like how this comic came out the same day (in UTC+10) as I am studying Earth geometry including the IDL. Nice little coincidence. [[User:OmniDoom|OmniDoom]] ([[User talk:OmniDoom|talk]]) 03:46, 14 November 2023 (UTC)

Why's there a missing line of latitude? [[Special:Contributions/172.68.140.145|172.68.140.145]] 05:47, 14 November 2023 (UTC)
:That is actually a good question. Seems like an error. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 08:01, 14 November 2023 (UTC)
: I would assume the lines that are shown are intended to be the equator, tropics, and arctic circle (antarctic being hidden out of view), being the most commonly known lines of latitude.[[Special:Contributions/172.70.85.151|172.70.85.151]] 12:04, 14 November 2023 (UTC)
:I think it's just the angle. If viewed from the side (instead of diagonally above as in the image), I think they would appear more equidistant. Or maybe they're based on a different projection entirely, that wouldn't be out of character for Randall either. [[Special:Contributions/172.70.46.254|172.70.46.254]] 12:08, 14 November 2023 (UTC)

Even if the lines were actual physical strings/ropes, they appear to be lying right on the earths surface instead of being suspended in mid air. So how would a rocket accidentally get snagged on one? You'd have to purposefully shove the rocket between the earth and the line before launch. [[User:Bischoff|Bischoff]] ([[User talk:Bischoff|talk]]) 08:39, 14 November 2023 (UTC)
:Well, obviously you wouldn't want ships/trains/etc hitting them as they moved longitudes(/latitutudes) or timezones, so they must be held up out of the way by skyhooks. Probably also above plane travel, or we'd see them being snagged quite often...
:Noting that I had to caveat the idea of the Russian launch-site, as NASA seems to be the named agency needing to fix the mess. Could of course be 'Hollywood Exceptionalism', regarding who it is who <s>leads</s> saves the world. Or ''actual'' expertise such as might have actually helped with the Kursk submarine, in a pinch (except that, geoplitically, currently it'd probably take even longer for Russia to deign to request assistance from the US than 23 years ago).
:I also, for brevity, skipped the needless pedantic analysis of typical 'first orbit' trajectories from ''all'' [https://aerospace.csis.org/data/spaceports-of-the-world/ current launch sites], worldwide, so as to work out whether any others might encounter such a North Pacific crossing-point at 'first hit' (after which, it's clearly high enough to not snag again). Depending on launch eccentricity, it's feasible from practically any of them, naturally. [[Special:Contributions/172.69.195.51|172.69.195.51]] 10:37, 14 November 2023 (UTC)

:Maybe it was a submarine launched rocket.[[Special:Contributions/172.70.86.53|172.70.86.53]] 12:06, 14 November 2023 (UTC)

:It's obviously North Korean. Russia disclaims any involvement. [[Special:Contributions/172.71.102.143|172.71.102.143]] 08:42, 15 November 2023 (UTC)

I think the "about 2 in the title text references the Windows approximate download times dialogs - GreyFox [[Special:Contributions/172.71.150.133|172.71.150.133]] 18:31, 14 November 2023 (UTC)
:It's not. They were about to say an absolute time, e.g. "by approximately 12:00" but they realized absolute time is paused so they gave a relative time instead. --[[User:NeatNit|NeatNit]] ([[User talk:NeatNit|talk]]) 22:39, 14 November 2023 (UTC)

This looks devastating for western Europe and western Africa. --[[User:NeatNit|NeatNit]] ([[User talk:NeatNit|talk]]) 22:39, 14 November 2023 (UTC)

Talk:2841: Sign Combo

2023-10-16T11:15:23Z

172.71.102.143:

Theoretically you can get around this limitation by turning off the road before the sign and doing whatever maneuvers you need to out in the wide open area to the right or left of the road. It's not a U-turn if you're not on the road, and you didn't enter a restricted part of a road either, and didn't stop on the road. After which you calmly make a turn onto the road when traffic is clear. [[Special:Contributions/108.162.245.207|108.162.245.207]] 02:34, 14 October 2023 (UTC)
:I'm pretty sure swerving off of a road is also illegal. [[User:SteveTheNoob|SteveTheNoob]] ([[User talk:SteveTheNoob|talk]]) 04:41, 14 October 2023 (UTC)
:: You can always just pull over - if a cop asks, just tell him you were lost or tired or had to take a phone call. And then take the opportunity to ask about the bloody sign! Anonymous 07:30, 14 October 2023 (UTC)
So does making a three point turn count as a u-turn? [[Special:Contributions/172.69.58.66|172.69.58.66]] 02:40, 14 October 2023 (UTC)
Wouldn't putting it in reverse stop you briefly as you switched from forward acceleration to reverse?
:Yes, this is also an example of Rolle's theorem as seen in [[2042]]. [[User:SteveTheNoob|SteveTheNoob]] ([[User talk:SteveTheNoob|talk]]) 04:56, 14 October 2023 (UTC)

[https://en.wikipedia.org/wiki/Immelmann_turn Immelmann!] [https://en.wikipedia.org/wiki/Stall_turn Hammerhead!] [https://en.wikipedia.org/wiki/Cuban_eight Half Cuban Eight!] [[User:Jordan Brown|Jordan Brown]] ([[User talk:Jordan Brown|talk]]) 03:21, 14 October 2023 (UTC)
:After clicking on your comment, I watched the gif on the right before reading the article. I was expecting some advanced driving technique or something. Imagine my surprise! [[Special:Contributions/172.71.102.143|172.71.102.143]] 11:15, 16 October 2023 (UTC)

You could obey the title text if it was 45 miles per hour and 65 meters per hour, respectively. [[Special:Contributions/162.158.90.96|162.158.90.96]] 04:04, 14 October 2023 (UTC)

: Perhaps so, but anyone deliberately occupying a travel lane while going 0.06 kph (0.04 mph = 200 feet per hour) in a 45 mph zone would [ahem] rapidly attract attention for other reasons. If it were 65 *kilometers* per hour (40 mph), you'd have a narrow window of legality (I do drive on a road that has a max 45 / min 30 speed limit). [[Special:Contributions/172.70.214.43|172.70.214.43]] 18:15, 15 October 2023 (UTC)

Take notice of the road markings too. At least here in Europe double white lines are not to be crossed. And they go past the point of the sign.--[[User:Henke37|Henke37]] ([[User talk:Henke37|talk]]) 07:06, 14 October 2023 (UTC)

: Aye - doesn't that combination of dashed and solid lines imply that there will be opposing traffic? Ie, the markings on the road expect traffic to enter past the sign, despite what the signs are saying, which adds another layer of absurd (Ignore the pole signs and use the lane on the right, otherwise the lane on the right can never be used?)

I can't be the only one that sees a Gaza strip evacuation subttext to this.

:Double lines are also "do not cross" in America. And I think in this case it's supposed to be yellow, the dashed-and-solid combo indicates a one-sided passing zone into a lane with on-coming traffic, and double lines in general are only use to separate anti-parallel lanes of traffic, both of which use yellow. "Solid double white lines" do exist, but are only used in very specific cases. Near me, there's a very congested exit, and the solid double whites are used to indicate "no really, you should have switched lanes ages ago, it's too late now!", but since it isn't a Jersey barrier or a line of rods or even a full on median, nobody actually follows the rule. Anonymous 07:30, 14 October 2023 (UTC)

:: BTW in Europe, yellow lines are reserved for temporary use, and then take precedence over any existing white lines. Makes lots of sense, because there are so many construction sites here. (And the yellow lines are actually just adhesive tape.) --[[Special:Contributions/162.158.87.102|162.158.87.102]] 08:28, 14 October 2023 (UTC)

::: Back when elephants had fur, road markings in the USA were white. Starting in the 1950s, road crews throughout the USA began using yellow rather than white paint. From memory, it took about a decade for the transition to be completed, with more rural roads the last to go yellow. [[Special:Contributions/162.158.90.161|162.158.90.161]] 18:18, 14 October 2023 (UTC)

Speaking of lines ... in the USA, "Do Not Enter" signs on open roadways usually signal that the road ahead is one-way traffic coming at you. A driver is thereby warned (for example) not to enter the "exit" ramp of a freeway. However, the road striping indicates that passing is permitted for drivers proceeding forward past the sign ... which is nonsensical if the only legal traffic is coming at the viewpoint driver. I am reminded of the ancient comedy routine, "Somebody went to the Army-Navy store, got himself a sign, looked out his living room window, 'Look, Martha, we caught somebody!'" [[Special:Contributions/162.158.186.118|162.158.186.118]] 19:19, 14 October 2023 (UTC)

And I completely forgot why I was posting in the first place: I think there's good reason to create a full "traffic signs" or "road signs" tag, not just "traffic lights". I know there's a page with a very complicated "this is what the road ahead looks like" sign that just says "good luck", and of course there's "Next Five Miles" and "Ahead Stop". Thoughts? Anonymous 07:58, 14 October 2023 (UTC)
:I would support that. I wanted to put this comic into a category but I couldn't find an appropriate one. --[[Special:Contributions/172.69.58.3|172.69.58.3]] 23:11, 14 October 2023 (UTC)

More thoughts: if you must not make a U-turn to the left, you should do it to the right.
And then return on the same lane, because of the double line.
And finally, the sign itself may be valid and not contradicting itself; it is your fault if you got on this road. ;) --[[Special:Contributions/162.158.87.102|162.158.87.102]] 08:28, 14 October 2023 (UTC)

In the Netherlands, the message on signs are only valid behind the sign (with the exception of the "precedence way" (voorrangsweg), where outside of built-up areas, the signs are after a junction (though technically... way before the ''next'' junction) , so a driver stopping /u-turning here wouldn't be violating anything except the double white lines.
Also, stopping out of necessity (e.g. the car in front is also stopped) is ''never'' illegal. [[User:IIVQ|IIVQ]] ([[User talk:IIVQ|talk]]) 09:06, 14 October 2023 (UTC)

:Stopping on a road with double white lines to your left may count as obstructing the road, which I can imagine to be illegal in many places? [[User:Gpvos|Gpvos]] ([[User talk:Gpvos|talk]]) 10:02, 14 October 2023 (UTC)

If I had to comply with these instructions, I would just put the car into reverse and argue that I was never "stopped". If I actually saw this in real life, I think I'd just slow down, put on my hazard lights, and make a u-turn when appropriate.[[User:Jsnider3|Jsnider3]] ([[User talk:Jsnider3|talk]]) 10:52, 14 October 2023 (UTC

UK equivalents: [[File:UK_traffic_sign_616.svg|50px]][[File:UK_traffic_sign_614.svg|50px]][[File:UK_traffic_sign_642.svg|25px]]
(Mounted vertically, obviously, and the Clearway would have to be the small version as a repeater/reminder, already being active). ...and Title Text would require suitable numeric alterations on: [[File:UK_traffic_sign_670V20.svg|50px]][[File:UK_traffic_sign_672.svg|50px]] [[Special:Contributions/162.158.74.23|162.158.74.23]] 11:51, 14 October 2023 (UTC)

"''Depending on the jurisdiction, signs may only apply to the road after them''" - uh, in which jurisdictions is that not the case? How could you adhere to the signage before you see them? --[[Special:Contributions/172.68.110.196|172.68.110.196]] 15:01, 14 October 2023 (UTC)
: I don't know US signage, but there are times over here in my locale when there's repeater/reminder signage, the situation (such as not being allowed to stop) already being in effect past a prior point. Or even "this is information you, as a driver, should already be able to infer from the rules of the road, but some of you are idiots and need A BIG HINT about something that you clearly have forgotten since the time you had to pass your driving test..." erected by the authorities. [[Special:Contributions/141.101.99.6|141.101.99.6]] 19:49, 14 October 2023 (UTC)

Since the lanes are separated by white lines instead of yellow, that means that the two lanes of traffic are going in the same direction. There isn't any roadway visible onto which one could make a U-turn even if it were permitted. --[[Special:Contributions/172.69.59.204|172.69.59.204]] 23:07, 14 October 2023 (UTC)
: That sort of thing varies by jurisdiction. White and yellow are common because they work well and are cheap. --[[Special:Contributions/162.158.74.58|162.158.74.58]] 07:30, 15 October 2023 (UTC)

Don't minimum speeds require the vehicle to ''be able'' to go that fast, but not actually ''drive'' this fast at all times? --[[User:Coconut Galaxy|Coconut Galaxy]] ([[User talk:Coconut Galaxy|talk]]) 07:42, 15 October 2023 (UTC)

Am I the only one who sees a Gaza Strip evacuation subtext in this? --[[User:GregXKCD|GregXKCD]] ([[User talk:GregXKCD|talk]]) 15:33, 15 October 2023 (UTC)
:Possibly. There was a similar comment above, but that was also posted by you. --[[Special:Contributions/172.70.178.91|172.70.178.91]] 20:06, 15 October 2023 (UTC)

:ha! thought it failed to post first time, wasn't really trying to belabor the point. --[[Special:Contributions/172.71.150.178|172.71.150.178]] 21:32, 15 October 2023 (UTC)

This is pretty much the plot of every Irish saga, except with geasa instead of road signs. [[Special:Contributions/172.71.94.158|172.71.94.158]] 17:13, 15 October 2023 (UTC)

Not even that uncommon. I find no U-turn signs get placed places where a lot of people do u-turn, often because they NEED to make a u-turn due to another previous sign issue. So having to do u-turns where no u-turn signs are, is like the f'ing default.[[Special:Contributions/162.158.95.187|162.158.95.187]] 08:41, 16 October 2023 (UTC)

== "No stopping at any time" and max/min speed contradiction ==

The "No stopping at any time" never applies if it is not possible to continue. If there's a traffic jam, nobody expects you to continue going and hitting a preceding vehicle. I'm pretty sure this meaning is the same in USA as it is in Europe.

In Europe, speed limit takes absolute precedence over minimum speed, and for clarification, minimum speed only means that vehicles that cannot sustain minimum speed are not permitted on the road. It also signifies that if the road is clear and weather permitting, it is safe to drive at that speed.
But, if you're not confident in your driving ability, or in inclement weather, or if there is traffic, or for any other reason, you're not expected to continue driving at that speed.
Motorways and expressways in Europe have an implied minimum speed of about 60 km/h, but if there are roadworks which have a posted 50 km/h or 40 km/h speed limit, you're not expected to drive 60 km/h and you'll be violating the law if you do.

Talk:2678: Wing Lift

2022-10-04T07:26:58Z

172.71.102.143:

Any chance this is related to the equal-transit-time fallacy? [[Special:Contributions/162.158.146.57|162.158.146.57]] 16:19, 29 September 2022 (UTC)
:For more information have a look at my paper here-https://arxiv.org/abs/2110.00690 [[User:AerospaceDoctor|AerospaceDoctor]] ([[User talk:AerospaceDoctor|talk]]) 02:59, 30 September 2022 (UTC)

"The plane of the wing" - looks like Randall messed up on the title text [[User:InfoManiac|InfoManiac]] ([[User talk:InfoManiac|talk]]) 05:52, 29 September 2022 (UTC)
:Or maybe not: It's the plane of the wing of the plane! [[Special:Contributions/172.68.51.160|172.68.51.160]] 07:21, 29 September 2022 (UTC)
: Yeah, I also don't think that this is a mistake. The word "plane" is not used as the device that can fly but as the description for the (bottom) surface of the wing. One word for two totally unrelated things. I removed the trivia-part. https://en.wikipedia.org/wiki/Plane_(geometry) vs https://en.wikipedia.org/wiki/Airplane [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 09:23, 29 September 2022 (UTC)
::"Unrelated"? How so? The wing is an aeroplane, as you describe; the vehicle fitted with said aeroplanes is now referred to by the same name. They now mean different things, but, in as much as the one created the other and they are superficially identical, there doesn't seem to be much of a case for their being "totally unrelated". [[Special:Contributions/172.70.90.245|172.70.90.245]] 09:48, 1 October 2022 (UTC)
:::It is "unrelated" because an [air]"plane" is a physical mechanical device that flies in the sky, while the "plane" used in the title text (being the two-dimensional geometric surface that is used here to reference the midpoint/orientation of the wing) is a conceptual geometric construct that has no physicality, and that word "plane" is not specifically related to airplanes in any way. [[User:TheHYPO|TheHYPO]] ([[User talk:TheHYPO|talk]]) 14:43, 3 October 2022 (UTC)
If you want to know how a wing really produces lift, it's complicated, and the best reference on the net for that is [http://www.av8n.com/how/ See How It Flies]. [[User:B jonas|B jonas]] ([[User talk:B jonas|talk]]) 09:39, 29 September 2022 (UTC)
:There's also a [https://www.scientificamerican.com/article/no-one-can-explain-why-planes-stay-in-the-air/ Scientific American] article from a couple of years ago that says there's no scientific concensus. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 13:13, 29 September 2022 (UTC)
:It's quite simple really - without wings, people wouldn't believe the plane would fly - the wings create faith, and faith lifts the plane.[[Special:Contributions/162.158.159.125|162.158.159.125]] 15:15, 29 September 2022 (UTC)
:It's even simpler than that. As the air goes over the curved top of the wing, it has farther to travel; this creates a pressure differential between that mass of air and the air beneath the wing. This low pressure draws the wing up, like pulling liquid up a straw. So in other words, airplanes fly because the wings suck. [[User:RAGBRAIvet|RAGBRAIvet]] ([[User talk:RAGBRAIvet|talk]]) 21:58, 29 September 2022 (UTC)
::You seem to be describing the "equal transit time fallacy". Air going over the top of a wing doesn't necessarily have to travel further (that depends on the shape of the airfoil), and even if it does that doesn't in itself imply anything about the pressure. [[User:Zmatt|Zmatt]] ([[User talk:Zmatt|talk]]) 20:11, 30 September 2022 (UTC)
::Lift is not complicate if you look at Prandtl’s original work, and Doug Mclean has done a good job editing the actual Wikipedia article. If you consider the entire atmosphere the asymmetric flow around an asymmetric body in a fluid results in an asymmetric pressure distribution, which is equal and opposite the pressure on the ground. That is, a wing produces a pressure difference that is transmitted in steady state to the earths surface which ultimately supports the aircraft as a reaction force. The asymmetry in the flow is the result of fluid mechanics and can be determined from Navier Stokes, which is Newtons laws of motion applied to a fluid, with viscosity. People get lost because they want to invoke momentum transfer, which is not needed in the global view. To see where the momentum transfer is occurring, you can only utilise think slices of the atmosphere as the control volume, hence the reason it is confusing. This is compounded by people seeing trailing vortices and stating that those must be the mechanism for the momentum transfer, and they are not. This was all established over 100 years ago. That Scientific American article is click bate, and I immediately asked the editor if I could write a response to it, and I got no reply. [[User:AerospaceDoctor|AerospaceDoctor]] ([[User talk:AerospaceDoctor|talk]]) 02:39, 30 September 2022 (UTC)
:::There's no question that lift results from the solution to the Navier-Stokes equations applied to asymmetric flow around a surface. The question is if there is a simplistic explanation for lay people that actually holds up. [[Special:Contributions/172.71.167.38|172.71.167.38]] 01:16, 3 October 2022 (UTC)

Could the spooky skulls be an inderect reference to quantum spooky action? Not sure how that would apply to lift, though.
:I assumed this was in reference to recurrent discussions of the use of 'golf ball' dimpling in anything related to aerodynamics. AFAIK this is entirely theoretical/experimental as far as use in aircraft wings, but I imagine it's something that crops up a lot in semi-informed lay conversations on the subject. [[Special:Contributions/172.70.86.26|172.70.86.26]] 15:31, 29 September 2022 (UTC)

This, following "Aviate, Navigate, Communicate", suggests to me that Randall is in the middle of a private pilot training course and reflecting on its lessons. BTDT. [[Special:Contributions/172.70.38.237|172.70.38.237]] 14:32, 29 September 2022 (UTC)

it says 3 main reasons and then lists 2?? [[Special:Contributions/172.69.68.20|172.69.68.20]] 15:13, 29 September 2022 (UTC)Bumpf
: If you mean 1) Bernoulli, 2) the angle, and 3) Coanda... that's definitely three. If you don't, then I'm not so sure what you're referring to. [[Special:Contributions/172.71.178.187|172.71.178.187]] 21:15, 29 September 2022 (UTC)

Can anyone help fix my reference. It said citation needed, so I went to the first great source, which is Prandtl. However, even though I followed the wikipedia way for making a reference, it has not produced a helpful link at the bottom. [[User:AerospaceDoctor|AerospaceDoctor]] ([[User talk:AerospaceDoctor|talk]]) 02:46, 30 September 2022 (UTC)
:I can see why this was confusing. On this site, there's an inside joke surrounding the citation needed tag, based on an older comic and on the way it's used in the What If section of xkcd. It basically means the opposite of what it means on wikipedia, and is sometimes inserted as a joke behind obvious statements or common knowledge. Your edit was fine, don't worry. No actual citation needed. [[Special:Contributions/172.71.102.49|172.71.102.49]] 07:26, 30 September 2022 (UTC)
::He was refering to the citation that ended up below this discussion page on the main page. In stead of in a ref section:
Tietjens, Oskar Karl Gustav; Prandtl, Ludwig (1957). Fundamentals of Hydro- and Aeromechanics. Courier Corporation. ISBN 978-0-486-60374-2
::We usually do no make this kind of references, but just links to them. Also therefore I do not know how to make the ref section, and would also prefer it was just a link to something usefull. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 13:01, 30 September 2022 (UTC)
:::I agree there must be a much better link for this than a half century old book, but I put a <tt><references/></tt> tag before the transcript. I'm not sure if you wanted it there exactly. [[Special:Contributions/172.70.210.49|172.70.210.49]] 21:25, 2 October 2022 (UTC)
:::But also, the citation wasn't really needed in the first place. I don't think many people on this site need to be convinced that wings provide lift. It was a [citation needed] tag, not an [actual citation needed] tag.[[Special:Contributions/172.71.102.143|172.71.102.143]] 07:26, 4 October 2022 (UTC)