system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why is third person called third person?

Why is third person called what it is? Is there a reason it is called that. Same for first and second.
gpt
The "first person" is the person speaking, for obvious reasons.

The "second person" is the person being spoken to, since that's the very next possible person.

The "third person" is anyone remaining -- so, someone other than the speaker and the listener.