(November 6, 2016 at 1:45 pm)Alasdair Ham Wrote: If your point is that we can't entertain absurdities, well, you're just wrong about that. It's a goddamned thought experiment, not an existential claim.
That's not my point. My point is we can't entertain absurdities without the logical law of A=A. Because we can't entertain absurdities without entertaining absurdites. There can't be a hypothetical without there being a hypothetical. Whatever hypothetical the OP is it is whatever it is. A=A. It can't contain within itself the premise that it doesn't contain the law A=A because A=A is already presupposed by having a premise at all.