A place for sharing the bad math that plagues reddit and the internet as a whole.
Content Guidelines
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Cranks: refutations of Cantor, "proofs" of the Riemann hypothesis, etc.
Misapplications of mathematics to outside of mathematics: the incompleteness theorems prove science is a lie, boolean algebra shows that 9/11 was an inside job, etc.
Complaints that mathematicians are doing mathematics wrong: 0 and 1 are not probabilities, infinity don't real, everything is a computer, etc.
Misunderstandings of what mathematics is: bad philosophy of math, bad finitism, bad criticisms of mathematics education, mathematics is just counting apples, etc.
Novel content: bad mathematics we haven't seen before.
Not novel content: things we see a lot of, 0.999... ≠ 1, stuff about 1 + 2 + 3 + ⋯ = -1/12, etc.
Nitpicks and pedantry: things that are mostly correct but have some minor errors.
People asking questions and earnestly trying to understand things, especially things from /r/askscience, /r/math, mathunderflow, or other places for asking questions about math.
Those stupid Facebook memes: Nine out of ten people don't know the answer to 1 + 2 × 3 - 4, Common Core says 3 + 3 + 3 + 3 + 3 ≠ 5 + 5 +5, etc.
People saying things which aren't incorrect but you don't understand. Especially be careful about stuff written by experts.
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Submission guidelines
Submit content according to the content guidelines. If it is not clear why something is bad, please write a comment explaining the badmaths. This isn't required and a short comment is fine, but it's nice to have. When linking to a large thread with lots of badmathematics in different places, collecting some of the worse bits in a single comment is a courtesy towards those who don't want to dig through the whole thing.
Commenting guidelines
In short, don't be an ass, or at least don't be too much of an ass. This is to some extent a sneer club, but if someone has an honest desire to correct their misunderstandings, productive comments are preferred to insults. If, however, they belligerently insist that they are right and anyone who disagrees is a shill for big mathematics, it's understandable if you fight fire with fire. That said, don't use violent or bigoted language. And of course, the site-wide rules for reddit apply.
Don't do /u/[username] summoning for badmathers, whether the badmather is the person linked or a celebrity of this subreddit. If you need to talk about a redditor, writing their username without the /u/ won't send them an orangered. Summoning people in other contexts is okay, however.
Bad: That /u/completely-ineffable in the linked thread is really bad and dumb and I hate them.
Bad: That person in the linked thread is so stupid. They're almost as bad as /u/completely-ineffable, who is regularly linked here for being bad at maths.
Okay: Lol, completely-ineffable gets linked here all the time. They're so bad.
Okay: That person in the linked thread sure seems to have some weird views about Gödel, but I don't know enough to evaluate them. What do you think, /u/Waytfm?
Flair
There are link flairs for posts about common topics. If you would like to request more flair, please use this thread and we'll get around to responding. Eventually.
Other Places
Please have a complimentary ö for spelling Gödel. And some handy Greek letters: α β κ λ ξ φ ω and miscellaneous symbols: ⇒ ∀ ∃ ∈ ≠ ≤
