I just watched the movie right now, every one else knew they were toy’s. Was Buzz brain washed or some thingXD
Its just part of his personality. Id say all Buzz’s in fact are like this.
All Buzz Lightyears remain in hyper sleep until their spaceship lands (kid opens box).
As Kyle said, it’s part of his character and background. In a way though, this would make one expect that all the other toys also assumed that they were whatever they actually are at first, before being told that they’re actually toys. Rex is a good example, as in the original Toy Story we see that he’s trying to be much scarier than he actually is- perhaps suggesting that at some point, he though he was a real dinosaur?
With Buzz, it took him longer than most other toys to realise what he actually is because his backstory is quite complex and also due to his stubborn character.
No idea, I always just thought that maybe it had something to do with his wiring or programing. Because he’s pretty much the only toy (with the exception of a few others), in Andy’s room that is as high tech as he is.
I kind of see it as a personality trait of space toys, since Zurg and the Pizza Planet Aliens also have that kind of thinking.