In the movie Terminator 2: Judgement Day (1991), after the terminators had arrived from the future to 1995, they are both trying to acquire John Connor.
The T-1000 arrives at John Connor's address and interrogates his foster parents:
Janelle: There was a guy here this morning looking for him too.
Todd: Yeah, a big guy on a bike, has that got something to do with this?
T-1000: No. I wouldn't worry about him.
At this point, is there any evidence that the T-1000 knows that this "big guy" is a T-800, or is he just confident he can handle anyone else aiming to acquire John?