If Buzz Lightyear dosen't know he's a toy, why dosen't he talk when there's humans about?

He doesn't trust their club.

I consulted my bible on this and looked into the book of Facts.

Facts 18:21; "Thine toy, you must not use the oration of your polymer in the midst of those that created you. For if thy do this in like manner unto the rubic cubites, you will be destroyed. Lo even unto thee I say, shut up around them."

Or you could just write the animation company and complain about their mythologies having holes.

Because toys black out when humans are around, he has no memory of these times.

i always wondered that - maybe they deleted a scene where the other toys told him to be still when people are present

Toys can't talk silly.

they are just not his kind of people....... waits till they are out of earshot.......dont want them in his business..

peace