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Code code:"if (foo != bar)"
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Search options not deleted user 51611

Questions designed to generate a "big list" of certain results, examples, conjectures, etc. via many individual answers, each contributing one or a few instances. Such a question should typically be in Community Wiki mode (CW); after asking, please, flag for moderators attention requesting the question to be made CW.

33 votes

Situations where “naturally occurring” mathematical objects behave very differently from “ty...

Almost all real numbers are uncomputable, yet almost every real number used in math is computable. -- Edit: Note that this does not meet all the criteria of the question, as clear explanations exist b …