This seems like a distinction without a difference, since we can never positively categorize any unobserved phenomenon as impossible (vs merely unobservable). To me, it seems ontologically cleaner to treat existence and observability as the same thing. shrug
Okay, fine, I'll come clean, I was just making an unfalsifiability joke. The original god-of-the-gapsy comment was the one that got me. Always just out of reach of our verifiability is the magic. Why not all the way out?
