Answers from atheists will vary on this point. Some will say that anything is possible, so the answer to this question may be a simple yes from those people.Possibility is something that needs to be argued in itself. We don't know whether it's possible for a god to exist or not. If we can't argue that something is impossible that doesn't mean that we assume it's possible by default.Of course, it depends on the definition of a particular god, such as whether it can violate the laws of logic... but if we're talking about a being outside this universe, creating this universe, that may not violate logic, but we also don't know whether it's possible.So the answer to the question is maybeNote: The original answer for this response was of course. The author's understanding of the topic has since evolved.