I do not understand what you mean.

Why would a non-animal machine never be able to have complexities and contradictions and paradoxes?

I’m not saying it couldn’t, I’m saying you’re making a mistake by defining me as a machine for no reason. But if you feel like a machine then be a machine but don’t tar the whole human race with that brush.

Well, ignore the "are humans machines" question. That part is irrelevant. The interesting thing is "can non-biological intelligence be conscious".

No.

I'm sorry, but that seems completely absurd. There's clearly nothing special about biology where only biological things could ever possibly be truly intelligent or conscious. Unless you think there's some kind of divine intervention where an omnipotent deity only grants certain beings consciousness, this hypothesis doesn't make any sense.