Philosophically, weak atheism is often associated with empiricism and rational skepticism. It aligns with the view that belief systems should be based on observable evidence and logical reasoning. Many weak atheists maintain that the burden of proof lies on those making the affirmative claim—that is, on theists who assert the existence of a god or gods. Until such claims are substantiated, the weak atheist remains unconvinced but not necessarily opposed to the idea of a deity. This position is also compatible with agnosticism, particularly agnostic atheism, where a person does not believe in any deity but also does not claim to know for certain that none exist. The term was coined by English philosopher Antony Flew in his 1984 book " God, Freedom and Immortality ".
In essence, weak atheism is a passive stance, characterized more by what one does not believe rather than by any strong conviction. It allows for intellectual openness and humility, focusing on the absence of belief without necessarily engaging in active refutation of religious doctrine.