(November 7, 2023 at 5:56 am)BrianSoddingBoru4 Wrote:(November 7, 2023 at 5:41 am)FrustratedFool Wrote: How does anyone prove that something claimed to exist doesn't exist? Maybe in mathematics that can be done, I'm not sure ... seems the non-existence of something is more likely something that can only be established to be increasingly probable. Not sure.
(Bold mine)
Usually, by demonstrating - either factually or definitionally - that the claimed something is absurd, impossible, etc. A frequent example is the 'married bachelor'.
Boru
That would be an informal proof. 'Cause there seem to be a lot of them.