My attitude towards many 'factoids' is to trust my hunches. Pedantically, I don't know (for example)that there are no gods, but I judge 'no gods' as a safe assumption to make, so i make it. That means all my reasoning could be wrong, but I see that as a small price to pay for not getting bogged down at square one!
I don't know how open I am to a good argument that god exists because I haven't heard any new ones for more than 30 years! i doubt any theist on DA has anything to say on the matter I haven't heard before. In short, I will continue to assume god does not exist until something causes me to change my mind. It might not even be a proof god exists - a demonstration that god is likely would probably do. But that seems unlikely to happen so I make no provison for it.
In general, I have no problem with making assumptions because its always possible to junk them and start again if neccessay. i think that is what Aristotle meant by 'entertaining' ideas.