We say “the doctor” when talking about the concept of a doctor. We tend say “my doctor” and not “the doctor” when talking about what our respective doctor told us. Kind of like how we refer to the clock as “my clock” when we notice a difference to the universally accepted concept.
Because no matter in what mirror you look, they‘re all the same. That‘s why we say the clock or the calendar. It‘s universal.
how about “going to the doctor”? :D
We say “the doctor” when talking about the concept of a doctor. We tend say “my doctor” and not “the doctor” when talking about what our respective doctor told us. Kind of like how we refer to the clock as “my clock” when we notice a difference to the universally accepted concept.
so “a” is universal for clock, but “the” is universal for doctor :D