Perhaps some Jesuit has been messing up your computer, Steve. They're a cunning bunch.

A proper conversation must start with the prior assumption that God does not exist. Saying there must be "no prior assumptions", in a world in which the default position is that God exists is no way to start a fair fight.

So your prior assumption is fine, unlike an a priori assumption you might disagree with...

Any proper discussion has to start from a basis of finding out what you agree about and what you don't and then exploring the differences and the rationale for these. And that's the way Jesuits approach discussions. I should know, since that's where I learnt to try to approach discussions in that way, at school many years ago.