Comment by mitthrowaway2

That's exactly right. A probability of zero is a truly absurd degree of self-confidence. It would be like if someone continued to insist that en passant capturing is illegal, even while being told otherwise by official chess judges, being read multiple rulebooks, being shown records of historic chess games in which it was used, and so on. P=0 means one's mind truly cannot be changed by anything, which leaves one wondering how it got to that state in the first place!

Probably most of us even know about en passant, so we think we know everything. But if I found myself in that same bewildering situation being talked down by a judge after an an opponent moved their rook diagonally, I'd have to either admit I was wrong about knowing all the rules, or else at least wonder how and why such an epic prank was being coordinated against me!