Atheism's Definition - Stanford Encyclopedia of Philosophy

[Ben Davis]

This is a terrible criteria of definition because "believe in" can be so vague and has been interpreted in so many different ways.

The question ought to be "Does God exist?"
Theist: Yes
Agnostic: I don't know
Atheist: No

Yet again, you're conflating knowledge & belief! This question is clearly about knowledge. Answers should be framed thus:

Gnostic: Yes
Agnostic: I don't know
Gnostic: No

"Do you 'believe in' God?"
Practicing theists: Yes
Non practicing theists: Depends
Agnostics, atheists, otherwise irreligious: No

Here I'm taking that "believe in" means something different from "believe in the existence of."

'Practice' is irrelevant. I can believe in something without having any forms of demonstration. And this still conflates knowledge & belief! Stop it! Answers should be framed thus:

Theists: Yes
Atheists: Any other response

It's very simple. Your willful lack of acceptance is indicative of dishonesty.