IIRC, Dawkins once admitted that he lacked absolute incontrovertible proof that there is no God.
Kind of approaching agnosticism from the opposite direction.
This is why I can’t see how Steven Hawking can make a blanket statement that there is definitely no God. An absurdity. He has no idea where the Big Bang came from. They can only postulate.
Not a very scientific approach.
Better to leave science to the scientists and faith in God to those who believe. There are brilliant men in both fields who dabble in both.