@Theland
I don't often resort to nit-picking but I couldn't let this one go by:-
//The intervention of a higher power is incredulous? //
Things, including abstracts like 'intervention' have the property of being credible or incredible.
People can have the property of being credulous (credo: belief) or incredulous. Credulous, nowadays, being synonymous with gullibility, or naïvity and incredulous, the state of disbelief.
When a person achieves an improbable thing, being a thing, it's back to incredible again.
Your dialect may vary.
British English is, of course, a dialect of American, nowadays. Excuse me while I do what I can to help preserve it. :-)