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no finite set of numbers is teh full set of the Natural Numbers.But only finite sets can be used as individuals.
Give the first necessary FISON which according to Cantor's theorem exists in case that their union is ℕ.The union of all FISONs does not cover ℕ. Otherwise Cantor's theorem would require the existence of a first necessary FISON.Sure it does, but you need to use an INFINITE set of them,
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