I think they’re pointing out the precision-of-language thing: a-theism is the belief that god does not exist. A-gnosticism is the belief that you are unsure whether any number of gods exist. The least amount of opinion you can have about deities is to be a disinterested agnostic (I think?): “I don’t care if god exists enough to wonder about it.”
(Since you can point to the deceitful-god theory to say that the entire universe formed in this instant with this state, and your memories are just a result of god’s machinations a moment ago, both atheism and agnosticism are non-disprovable. The deceitful-god theory may run counter to the common Christian doctrine of Theodicy and may therefore not be subscribed to by many.)
how is lack of belief a belief?
I think they’re pointing out the precision-of-language thing: a-theism is the belief that god does not exist. A-gnosticism is the belief that you are unsure whether any number of gods exist. The least amount of opinion you can have about deities is to be a disinterested agnostic (I think?): “I don’t care if god exists enough to wonder about it.”
(Since you can point to the deceitful-god theory to say that the entire universe formed in this instant with this state, and your memories are just a result of god’s machinations a moment ago, both atheism and agnosticism are non-disprovable. The deceitful-god theory may run counter to the common Christian doctrine of Theodicy and may therefore not be subscribed to by many.)