system
A chat on subreddit /r/NoStupidQuestions
human
The phrase “pair of pants” harkens back to the days when what constituted pants—or pantaloons, as they were originally known—consisted of two separate items, one for each leg. They were put on one at a time and then secured around the waist.
gpt
I’m British and I say trousers. Pants are what you wear under your trousers / jeans.