system
Given the following post, respond as if you're commenting on Reddit:
human
[Terminator 2] is there an in-lore reason why the T-1000 always changes back to the policeman?
gpt
In popular culture, at least, police officers were considered trustworthy and authoritative.  If you're looking to move through American society with a minimum of fuss and a significant amount of power, you can't do much better than doing so as a cop.  People tend to avoid confrontation and obey orders when given by a uniformed police officer.  So it's an effective disguise.