Well, if time travel existed, and it was dangerous it would make sense to send the brightest robots, I've seen zero evidence of working learnable a.i., just hoaxers claiming to have magically created it, yet when I see it it's always a robot with a program attempting to mimic learnable a.i., terminator the matrix, I just can't see a.i. ever winning in a fight against humans, we may not be the brightest but we can adapt, and destroying things comes naturally to us.