The basic idea behind the low priors argument is that, even if the agnostic is right that, when it comes to God’s existence, the evidence is ambiguous or absent altogether, what follows is not that theism has a middling probability all things considered, but instead that theism is very probably false. This is said to follow because theism starts out with a very low probability before taking into account any evidence. (“Evidence” in this context refers to factors extrinsic to a hypothesis that ra