@Dang Martin i know the distinction people try to make of it. My point is there’s a reason you want that distinction to be there isn’t there? Taking Regs quote and insert the word “fairy”….like so: “There is a significant difference between having no belief in a fairy and believing there is no fairy…” The conclusion is the same. Grammatically they mean the same thing.
Having no belief in a fairy is rather straight forward. There’s no belief to hold, or to maintain. It takes no work.
Believing there is no fairy indicates that there is a belief to hold, or to maintain.
This is one of the problems with the word “believe.” Christians struggle with it.