Subduction Zone
Veteran Member
Most atheists do not claim to own a cat. Most atheists do not claim that there is no God. They have a lack of belief of gods in general and may be able to refute specific versions of god.The rules are the same for atheists as religious people. In fact it applies to all claims as a "golden" rule.
The only difference is that many claims are not particularly important, like you might claim to own a cat. The burden of proof is still on you, but the majority of people, will accept it without demanding you to demonstrate it, because it is of very little importance, whether you do in fact own a cat or not.