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M8dude t1_j299cw4 wrote

you're not dumb, it's just counterintuitive.

any number x between 0 and infinity can be paired with a unique number 1/(1+x), which is between 0 and 1.

any number y between 0 and 1 can be paired with a unique number (1/y)-1, which is between 0 and infinity.

there are no exceptions, so none of the two sets of numbers have 'more' numbers in them.

Talking about the 'size' of these sets of numbers is a whole different story.

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