The Supernatural

Is this term an oxymoron? I suspect it is. Or at least, I think the worldview it describes is incoherent.

J.B.S. Haldane said;

“Now my own suspicion is that the universe is not only queerer than we suppose, but queerer than we can suppose.”

Which suggests to me the following hierarchy of possibilities:

1) The universe is queerer than we suppose.
2) The universe is queerer than we can suppose (Haldane)
3)The universe is queerer than we will ever be able to suppose
4) The universe is queerer than anything can suppose
5) The universe is queerer than anything will ever be able to suppose

So is 'supernatural' a contingent term, dependent on some specific time and epistemic horizon, or is it a statement of principle?