No I devoted some time to the topic and have come to the conclusion it is logically impossible to prove a negative. There is no way to logically say PU or FSM or Allah do not exist.
Of course the opposite is possible – it just has never occurred. I am satisfied with my small understanding of our human mind to comprehend that people who talk to invisible things that talk back usually have a mental disorder. There are prophets all around us - I met one the other day at the corner. You should have seen his face when I started talking to the invisible person he was talking to! He looked at me like he had eaten a lime and then said: “You've got to be shitting me mate, what ... ya a crazy fella...?” And then kept talking to the invisible person!
Haaa!
I’ve met Christian theologians who have told me they were agnostic Christians. They accepted it was not possible to prove God logically but continued in their belief.
It's fare enough isn't it?
Michael