system
Given the following post, respond as if you're commenting on Reddit:
human
Can you drown someone with water vapor?

Is it possible for water vapor to be so dense that a person drowns by breathing it in?
gpt
The maximum humidity at ambient temperature is still only a small percentage, nowhere near close to enough to start displacing oxygen.

You could do it with water *above* its boiling point, but drowning is the least of your concerns then.