Yeah I mean of course we're all speculating. I just disagree that the mimics don't know they're mimics. I think they know exactly what they are and just know exactly how to fake being human.

There's actually a great example of what you're talking about in the Dune books though. The Tleilaxu invent perfect Face Dancers that completely replicate their target and then the mimicry is so perfect that the copy believes it's the original and they lose control of them