system
Given the following post, respond as if you're commenting on Reddit:
human
[Toy Story] What are the rules and who established them?

When planning against Sid, Woody mentions "breaking a few rules", what exact rules? I understand the basic idea is that no one can know their alive, but what are the specifics? how does Woody know these? how do all the toys at other houses, stores, etc. know these rules, even Buzz Lightyears who have no idea that their even toys?
gpt
The rules are not rules at all, being far closer to laws of physics than to actual rules. The only reason they are called rules is because most toys interact mainly with children, who are more frequently bound by rules than laws, and by the time toys figured out what laws even were, there was no reason for a name change. We cannot know who set these rules in their world more than we can know who set the laws of physics in ours. The rules are likely basic laws of the universe, implanted into toys in the moment of their creation. The toys found that they were mostly unable to move when played with and discovered their own rules, just as we discover the laws of physics. The rules likely have to do with toys not making their sentience known, as shown with Buzz who never even fidgeted or attempted of escape throughout months upon months of play, despite being entirely unaware of being a toy, so we can assume that these rules are concrete and function like laws for most toys. The only reason Sid's toys could break these rules is because they were the toy equivalent of zombies. They have been broken,("killing" them) recombined, and reanimated into a state where they are no longer considered toys, giving them the unintended side effect of being able to defy the rules which bound the rest of the toys.

tl;dr The Toy Story world has some strange physics with toys, it's probably quantum.