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Must have been a hell of a fight? Pirates from the British or the Spanish crown?


> For the person invited to uninvite themselves after is a bit weird.

If I invite you to my party and you agree, your not allowed to leave before I allow you. Yours sincerely, Vlad Drăculea


There you have your solution Idaxit! Leave the US, split the state and rejoin the union (US) in case you still feel like. ...or maybe don't and just use the chance and bring your legislative and judiciary into the 20th century. You will be still a ahead of the then neighbouring US at least by a century. Maybe even other states feel to follow the lead. I've heard Florida is always easy to convince for such a move; maybe skip the war declaration this time. ;-)

Disclosure: I have no clue about the underlying political/"cultural" differences of Idaho in contrast to the rest of the states...or Florida for this matter.


The only problem is, it's been pretty well established by the Civil War that a state cannot secede. Otherwise good idea.

In practice, though, would the 49 remaining states invade Idaho & force them back in? The middle of the state is pretty wild & mountainous.


Common, this is genius. Plot reads: in 2154 a soldier from the future is send back in time to the present.

Why send a soldier from the present to the past when you can also have a soldier from the future send to the past!


I agree but I'm confused how you can use Signal in the same sentence then.

Reminds me at duckduckgo: makes claims and builds big branding about security but nobody (including me) ever questioned them. (Regarding article not at hand but of course also on HN.)

The first question I would ask: how does Signal finances itself when the service is practically "free"...

For the rest I totally agree: I could also convince some for XMPP/Jabber while at the same time it lets me question my relationship to those I couldn't move. I mean it's not that these days you couldn't install a second app if you already have 50 useless i.e. "coupon" apps installed anyway.


> I mean it's not that these days you couldn't install a second app if you already have 50 useless i.e. "coupon" apps installed anyway.

Don't get me started on this. It saddens me to see so much resistance from a lot of my friends that don't even want to try a tiny, privacy-friendly, open-source, non-battery consuming app when they have like 50 attention-stealing spyware apps installed on their phone. Marketing works scandalously well.


Signal is a nonprofit that depends on donations.


Though I really like the idea of having some backup infrastructure already for those discussed simple cases like (top comment for example): car broke down and you.. .. forgot your mobile .. out of battery .. out of "credit" (in case of prepaid) .. cuz you got robbed .. cuz you got raped....(!) .. cuz you lost your fingertips and can't operate a touch display anymore.. .. possibilties are hopefully rare but endless but you're just in whatever emergency at 3 am and really need a to make a call!

But just for curiosity, whom/where you wanna call in 2022++ in case of overloaded networks like Sep. 11th in 2001. At least I didn't even "own" (actually set-up) my landline anymore.


Welcome to MMXXII. About X centuries ago "we" imported the Hindu-Arabic numerals. I know, Latin numbers carry the myth of being more "safe" but really you should try the arabian numerals. They revolutionized math and eased reading text alongside. thumbs-up


It's a convention to use roman numerals for centuries in some european countries. Parent poster probably just done it out of habit.


Thanks, I wasn’t aware it is not a “global” convention and wasn’t sure what does the parent make fun of.

One learns every day :) I will be more careful about this when writing centuries in English the next time.

Also this poster on quora have a detailed list https://www.quora.com/Why-do-we-write-century-numbers-with-I...


Im sorry to be a party pooper but though Linking Sigil is also mentioned in the article but that's not what the article is refering/asking about.


Hmm, the article links to the Linking Sigil at the bottom, in the links section.

But the rest of the article is concerned with how mysterious the symbol is, and how no one knows where it came from.

A clue: anyone can register a symbol for a surprisingly small fee.

A question: why would the sigil be mentioned in an addendum but not in the article proper?

Anyway, it's pretty obvious that GP had a premonition this morning, with a pay off.


> A clue: anyone can register a symbol for a surprisingly small fee.

A unicode symbol? I want a symbol! How much are we talking about?


There's a process for it. I'm not sure it costs anything but it's a bunch of paperwork. You have to justify what it's used for, why existing solutions don't work, etc. The working group is probably pretty reasonable, but I'm sure it's an involved process.

If you do, can you please tack on symbols for following external links, space bar symbol, and all the other miscellaneous internet adjacent characters I always have to reach to Fontawesome for?

http://www.unicode.org/pending/proposals.html


Dislosure: I'm not directly from the fields of the Sciences Of Angles And Ambiguously Crossing Lines nor I've every seen or used this symbol before. However to me it's, pretty evidently, supposed to be a "no right angle" symbol.

(A) It's in the math section, (B) it's with angles, (C) the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area and

(D) at least by my 30 s internet search on a mobile phone I couldn't find any other "no-angle" or "no-right-angle" symbol.

Someone could argue that usually you use a simple strike through as like as in ≠ (unequal), ∉ (not-element-of) or ∅ (empty set) but I would say it was chosen to avoid confusion in this case. The angle itself (without the "no/not") consists of only to orthogonal lines so it would be kinda complicated to "strike it though" in any direction without ambiguity that would resemble a triangle, a fork or whatnot.


> the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area and

I don't think it's that common. At least, I don't recall seeing it ever. Maybe it's used in non-English mathematics?

Wikipedia mentions it's also used in electrolysis so maybe this new one is related to that somehow?


It's used in german mathematics education (secondary level), either to mark a contradiction in a proof or more generally to mark an erroneous statement.


But I have never seen it to mark negation of a condition, that's usually done with a slash (as in ≠ ≮ ≯ ≰ ≱ ≴ ≵ ⊄ ⊅ ⊈ ⊉ ⊊ ⊋ ∉ ∌ ∄ ∦, you get the idea).

So for "not a right angle" I'd have expected a "right angle" symbol with a slash through it.


Funny enough, I've only seen it at the Gymnasium (secondary level) and not in the University a few years later -- then indeed the usual symbols were the 'slashed' relations like you've described, or the bottom symbol: ⊥ in logic. Maybe it's an idiosyncrasy of a certain subset of math teachers.


But how would you position the slash to get a somewhat easy to decipher symbol? To me, the right angle symbol seems to lend itself more to this unorthodox negation through the contradiction symbol than to negation through the normal slash.


Also in Dutch universities to mark a contradiction, especially in a proof by contradiction.


Same. Never seen that symbol in my life. I've seen ¬, ~, !, etc used for not/negation in computer science, math, logic, etc.

And some commenters said they used it to mark proof by contradiction, but why is there a need to mark it when you are showing it via proof? A canonical example of proof by contradiction is proving sqrt(2) is not rational. Never have I seen it marked with that symbol. Where would you even mark it? At the beginning with the assumption? Or at the end like QED?


Math degree holder from Iowa, yeah, I've seen and used it many times. The symbol is used when you reach the contradictory statement. Like "1 = 2".

"By way of contradiction suppose P, then ..., thus ~P ↯. Therefore ..."


I've actually always wanted a way to mark "the contradiction" once I've obtained it. Thanks!


To me that reads: I throw your assumption into the GROUND!


I was taught it in extracurricular mathematics in Australia. We were taught that it goes at the end of a contradiction proof once the contradiction has been found. We used to write it extra large, like lightning strike. I think of it like a proof mic-drop.


It's the first symbol referenced for symbols used in proof by contradiction to show contradiction [0]. I know that's not exactly "not" or "disproof" but I think that might be what the poster was getting at.

[0] https://en.wikipedia.org/wiki/Contradiction#Symbolic_represe...


I believe I have seen it used as a symbol which indicates the discharge of an assumption, but never for "not".


I submit to you that it's clearly not a thunderbolt but an arrow indicating changing directions; that being overlaid on top of a pair of axes is obviously useful in the study of non-Euclidean geometry to indicate the use of wibbly-wobbly dimensions.


Particularly useful for timey-whimey relativistic analyses.


Related to The Whole Sort Of General Mish Mash.


I've thought that it would be cool to have a Wiki with an entry for each character, describing what it is, and its history. Although that wouldn't help for mystery characters like this one, there are a lot of characters with stories behind them.


I was just discussing :man-in-business-suit-levitating: with some friends earlier today. Also an interestingly cryptic background, albeit not an unsolved one.

https://emojipedia.org/person-in-suit-levitating/

(Edit: Apparently HN automatically removes emoji.)


The story behind MIBSL is definitely fascinating and some great trivia there. There’s a longer article about it here: https://www.newsweek.com/2016/05/06/secret-ska-history-man-b... that covers not just the inspiration for the emoji itself, but a brief history behind the inspiration behind the inspiration. Lots of levels of metaness to unpack.


I love this! I've always assumed it was a rude boy emoji. Was briefly in a high school ska band :D


Wikipedia already does this for many symbols. See for example...

https://en.wikipedia.org/wiki/Miscellaneous_Technical

Aside from the table describing each symbol, if you scroll to the bottom of the page, it links out to full articles related to each. For a full list see...

https://en.wikipedia.org/wiki/List_of_Unicode_characters


I like this idea. It would serve as a place to put a well-sourced answer to the question about this character, and the talk section could be used to discuss further investigation into the topic, or when new uses inevitably arise.


That doesn't jive with the history in TFA — the Unicode name and location was inferred from the symbol itself without knowledge of its meaning.


I don't see the contradiction. The only thing they used from the name is the "right angle" aspect. Given their argument is this is a composition of thunderbolt + X, for some X (and derived from their prior knowledge of thunderbolt's compositional meaning), deciphering the image as "thunderbolt + right angle" is trivial and consistent with the naming origin in TFA.


Right angles have a small box near the vertex which denotes it is a right angle [0].

This symbol doesn't have that box, so I don't think it's a right angle.

[0] https://en.wikipedia.org/wiki/Right_angle#/media/File:Right_...

Edit: This merely adds to the confusion, since the name of the glyph contains the words "right angle."

¯\_(ツ)_/¯


https://en.wikipedia.org/wiki/Right_angle

> In Unicode, the symbol for a right angle is U+221F ∟ RIGHT ANGLE (HTML ∟ · ∟). It should not be confused with the similarly shaped symbol U+231E ⌞ BOTTOM LEFT CORNER (HTML ⌞ · ⌞, ⌞). Related symbols are U+22BE ⊾ RIGHT ANGLE WITH ARC (HTML ⊾ · ⊾), U+299C ⦜ RIGHT ANGLE VARIANT WITH SQUARE (HTML ⦜ · ⦜), and U+299D ⦝ MEASURED RIGHT ANGLE WITH DOT (HTML ⦝ · ⦝).[5]

> In diagrams, the fact that an angle is a right angle is usually expressed by adding a small right angle that forms a square with the angle in the diagram, as seen in the diagram of a right triangle (in British English, a right-angled triangle) to the right. The symbol for a measured angle, an arc, with a dot, is used in some European countries, including German-speaking countries and Poland, as an alternative symbol for a right angle.[6]


This merely adds to the confusion, since the name of the glyph contains the words "right angle."

The article notes that sans a given meaning the glyph was given a “descriptive name”.

So you’re not wrong? :-P


Perpendicular + Unicode combining solidus = ⟂ + / = ⟂̸


I think perpendicular most commonly refers to lines/vectors/planes etc., while the right angle symbol refers to angles. Also, there are often multiple symbols expressing the same thing.


Yes, a sibling comment meanwhile found the right angle symbol U+221F ∟

https://news.ycombinator.com/item?id=31015104


> (C) the thunderbolt ↯ is commonly used for "not" or more specifically for dis-proof in this area

Any examples?


I believe in German (possibly also other languages) the thunderbolt ↯ is commonly used to mean "this is a contradiction" in a mathematical proof, equivalently to in English a kind of ⋕ rotated by 45° or the symbol ※. The symbol ⟂ on the other hand means "false" and is used in particular in formal logic.


Yes and no.

Yes, we indeed used and afaict still use the thunderbolt for contradiction in my German university.

However "perpendicular" and "bottom/falsum" are two different Unicode codepoints with very similar glyphs.

https://en.m.wikipedia.org/wiki/Up_tack


I've seen it used for contradiction. Though that's not the same thing as 'not' and I can't think of why you'd combine this with orthogonality.


If the thunderbolt means not, and the right angle is displaying the x and y axis, then this symbol could be a pun for "not a function".


High school physics and math as a major. I could scan you my scripts and papers if you're interested.....no won't. ;-D

But maybe "commonly used" was maybe the wrong term. More appropriately: "sometimes" or "by some".


Where in the world? I’ve never used it despite similar background. Perhaps regional?


I have never seen it used as not once in maths or physics. "extremely rarely" perhaps.


To be fair, there are lot of math symbols out there.

http://mirrors.dotsrc.org/ctan/info/symbols/comprehensive/sy...

There are lots of examples of the lightning bolt in there. In fact, under ulsy Contradiction symbols, there are four variants.

I also noticed the exact symbol being discussed is listed under "Angles".



> 2. You don't think that roads should be a car only domain? What do you think roads are for?

For example for my messanger on my horse so he doesn't get stuck in the mutt on it's voyage to the next city. ... or maybe my zenturie to support my legion?

What makes you think (or suggest) that roads where invented for cars?


I never said they were invented for cars. My question was why don't they think roads, as they are in 2022, shouldn't be a car only domain? This argument of "well their original purpose was for..." is logically incoherent in a multitude of ways. There are thousands of things that we use a bit different than originally as intended due to the advancement of modern tech


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