Re: The set of necessary FISONs

Am Tue, 18 Feb 2025 09:54:02 +0100 schrieb WM:

Therefore I gave you an example that you should be able to understand:
If every human has ended, then the human race has ended.
Analogously: If every FISON has been removed without changing the union,
then the set {F(1), F(2), F(3), ...} has been removed without changing
the union.

But the union has changed from a nonempty set to an empty one.