If people is plural of person, why carpool signs say 2 or more persons in california?
people is a collective term used when the distinction between one and the next is not relevant
in law each person must be treated as an individual person
there are two persons in the car, each of whom is responsible for buckling his or her own seatbelt
when a distinction within large groups, needs to be made, to distinguish between ethnicities or races they pluralize the word people into “peoples”
the Jews and the Muslims are two very different peoples
