How many strong assumptions do unbelievers need?

[abaris]

How many strong assumptions do atheists and agnostics need to make? The weaker and more modest a claim is the easier it is to defend in a dialogue with others. I could just point out theists and supernaturalists have fail to support/prove highly speculative-controversial claims needed to rationally warrant strong belief. I don't have to make claims about metaphysical naturalism being true, or even assume methodological naturalism to not hold supernaturalism and theism to be true. 
What do you think?

Honestly, I don't need any assumptions. I don't believe because there's no case to be made for believing. And as far as conversations are concerned, I usually don't have any about religion. Usually because I happened to have one with a work collegue just the other week. Didn't last long and went like this: Me atheist, he agnostic, which amounts to the same.

As I said repeatedly. In my country, religion just doesn't crop up when talking to other people. There are a thousand other interesting things to talk about.