Atheists are, by definition, naturalistic materialists; i.e. they believe that only the physical universe exists, only the nature exists therefore there is no supernatural and certainly no God.
Can you, therefore, be an atheist but believe in logic and maths? As far as I can tell, logic isn't a thing. And neither is maths. Logic isn't made of anything, it has no matter. And neither does maths.
Naturalistic materialists believe that the world is constantly changing, as 'proven' by evolution. Therefore, can an atheist believe in logic? Afterall, does logic ever change? And what about maths; does maths ever change? Or are both universal and unchanging? For example, are there parts of the world - or a time in history - when stubbing your toe wasn't painful? Was there a time when it was logical to hit yourself over the head with a blunt object? Was there ever a time where 2+2=5? Are there parts of the planet where this is true?
Of course not. Logic and maths are constant and universal. They're also not made of matter.
Is it true to say, then, that the atheist worldview is contradictory? Either there is only constantly changing matter or there isn't. Either their worldview is absolutely true, or it isn't. Logic has an excluded middle; something either is or it is not. There either is only a natural, material universe - and this worldview is absolutely true - or it is not.
Can an atheist - a naturalistic materialist - argue for their worldview without being fundamentally contradictory to it? And does that contradiction prove that their worldview is in fact false?