I am not sure. But humans can often explain the thought-process that led them to a certain decision. I think that counts as evidence of consciousness., in humans.

Humans can explain rational thought, sure, but not subconscious or acting on impulse. When you say something you shouldn't have said, how do you explain the thought process that led you to saying it? Were you an unconscious actor when you unwisely started an argument with your manager?

Yes you can be conscious about having been unconscious earlier. We do have reflexes. But we also have consciousness about our own thinking.