Absent input from God, they are indistinguishable. The question has always been, "Has God given input?" Clearly, I understand that God has.
If they're indistinguishable, I don't know that it makes a difference.
I agree, that is reasonable.
Only insofar as the question never touches religion, which it often does. Even then, though, the problem isn't religion—people need to learn to stay in their own lane, I'd say. Not, mind you, in terms of never sharing differences of understanding, but in imposing them. I'm guessing most objections to "religion this" or "religion that" stem from unwanted imposition of religion, rather than the simple fact or nature of religion (unless the nature of a religion is to impose!)
The simple equation is that God gave evidence to man (prophet), prophet told man (me), I sought evidence from God, God gave evidence to me.
I don't know whether the mechanism is discoverable, or requires revelation, as in the equation above.