Is there any way to describe this belief?

[R-e-n-n-a-t]

True, he didn't specifically say that he was correct like the fundies tend to. It's a fairly easy claim to defend the idea that he believes it. While that itself is a positive claim, 'tis irrelevant unless he makes a claim that something is as it relates to reality, rather than that something is believed.

Oops, should have put "reality" in quotes I guess.

[NoMoreFaith]

I have a belief that anything and every idea is possibly true. And if an idea cannot be true here, it is true somewhere else. I haven't thought on the idea much, but it does match how I think.

Sounds like an Infinite Multiverse Theory.

The problem I always had with that, is that if every idea is possibly true, or true elsewhere, then the paradox is that the idea there is only 1 universe or finite universes must also be true.

In order for it to be true, it could not be infinite, but finite, limited by constrictions within each universe that cannot escape that version of reality at least on any meaningful level.