We’re talking about something internal—our beliefs, in the context of how they are necessarily dependent on something external—for example an object, or in this case a physical event.
Whether a belief (internal) is true depends on whether the object (external) is factual.
I don’t think so. The only context we discussed that had to do with a belief being dependent on something external, was my example of the resurrection. I only used that because you weren’t satisfied with my original answer, right? That’s not what we or the others on this thread are really talking about, is it?
What about the belief that sins are forgiven? What would be the object in that case?