infinity 
it appears this tweet has generated a wonderful philosophical discussion on "what is a number?" [pats self on back]
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Thanks. Twitter will use this to make your timeline better. UndoUndo
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The concept of "number" is pretty flexible. Humans started with whole numbers, then included fractions, then irrational numbers, then zero, then negative numbers, then imaginary and complex numbers. The "extended reals" include +infinity and -infinity: https://en.wikipedia.org/wiki/Extended_real_number_line …
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I'm a big fan of the extended reals. Perhaps i should have said "naive manipulations treated as a number are invalid", but that didn't have the same zing to it
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>mfw infinity is an ill-defined concept and we all should accept the fact that numbers actually have an end
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good luck making things consistent
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I am not particularly fond of the add-on: “it’s a concept” either
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well everything in math is a concept.. that doesn't make infinity special
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Which infinity are you talking about? One of the transfinite cardinals? An infinite ordinal? Something else?
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Any of them lol
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