I said Abraham didn't exist, because you know, he didn't. We're expected to believe this man had a child when he was 100 and his wife was 90.
I didn't know that one. I'm learning Islamic scripture as I go along here. We obviously have access to enough biological evidence to confidently state that a ninety year old woman cannot reproduce. That in itself is only evidence of that part of the story being bollocks though, not necessarily evidence that Abraham didn't exist.
Edit: The 100 Muslims example would under no circumstance be considered evidence. You wouldn't get scientific consensus on such a comprehensively shite test.
I implied it'd be flimsy evidence; obviously not enough to garner a consensus regarding the existence of Christians in Egypt. It's nevertheless evidence though, just not very compelling evidence on its own.
Or perhaps there's an official cutoff point when evidence becomes merely data?