1 How are you certain that no gods exist?2 Do you believe this is the only reality? Basically, that this is the only universe and there are no other universes? Again, how are you certain?3 Do you believe aliens exist?4 Do you believe human intelligence is the only type of intelligence that has ever existed? Basically, that humans are the first entities that exhibit this type of intelligence, consciousness, sentience?
i think they are good questions.
1 - very certain. As a sciencey type I should really say "No, because we can't be certain of anything". But on that basis the answer to every question 'are you certain X?' is no, so there's no point asking. So i'm as certain no gods exists as i am certain of anything. About as certain as the sun will rise tomorrow, a lot more certain than I am brexit is a good idea.
2 I read pop-sci. I tend to go with whatever seems most mainstream amongst proper scientists, which (at 7/3/19) is that there are multiple universes. I don't have strong views about it.
3 Lots of uncertainty here. my gut tells it's 50:50 for bacterial life in the solar system. Intelligent aliens exist somwhere, but probably itoo far away to matter. I'm not expecting the light-speed barrier to be broken and space is very, very big.
4 i think we humans over-estimate our uniqueness. I think the differences between human brains and animal brains is mostly in degree, not kind.