Atheists like Dawkins presume that there is nothing beyond that which can be grasped with our mental categories; insights afforded to us via observation and mathematical equations. But it is an unscientific standpoint as they provide no proof for their standpoint, neither mathematically nor empirically.
This is so flimsy a position I don’t quite know where to start. If there is “anything” beyond our mental categories then it is “nothing.” Kant pointed this distinction of noumenon (negative and positive) centuries ago. Are you familiar with his work at all?