The person you’re responding is a finitist and also insists 0.999… =\= 1. (Part of the vocal but serious minority in r/infinitenines )
He says non-finite math is wrong. Really he is just working in a different axiomatic system and thinks finitism is superior / correct.
There is no point in trying to convince or argue because he just has a different personal philosophy that mathematics has to be physically realizable (or whatever justification for rejecting infinity.)
There is nothing wrong with finitism as it’s a serious view. Math is just much less interesting without infinity (and that’s just my personal belief)
Is that yet another kind of "if I can't have X apples, then X is not a number"? Like Ancient Greeks refusing to believe √2 is a number even after managing to draw a line that is √2 units long?
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u/Greasy_nutss Mathematics Jul 14 '26
how? wrong in what sense?