The kind of possibility that doesn’t change, go away, or dissipate is what I believe is called logical possibility.
It’s the case the cat is on the mat and it’s not the case the cat is on the mat is a contradiction, but the cat is ACTUALLY on the mat and the cat is POSSIBLY not on the mat is not a contradiction. Since it’s not a contradiction, the possibility survives.
OK I give up. That's just weird. I think you should eat more haggis.
Well, it has an air weirdness about it, but with logical possibilities, weirdness abounds! Many downright physical impossibilities are nonetheless possible, logically.
The distinction seems divergent enough to warrant a descriptor so that people can appreciate the difference.
