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There are infinitely many possible criteria. Some examples:

living and non-living,

bigger than 10 cm3 or not,

red or not-red;

edible by me or not (a simple edible and not edible does not work because some people may not be able to ingest nuts, milk, wheat because of intolerance,

taller than you or not taller than you.

I hope these examples illustrate the hopelessness of trying to draw up a list of such dichotomous groups.

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11y ago

What else can I help you with?