
You can't know that.
How can you POSSIBLY know that?
The Big Bang Theory Season 2, Episode 19

How can I POSSIBLY go?
The Big Bang Theory Season 2, Episode 23

Or POSSIBLY Durham, North Carolina.
The Big Bang Theory Season 2, Episode 7

Events you couldn't POSSIBLY have anticipated
or prevented, even if you had.
Game of Thrones Season 5, Episode 7

how could I POSSIBLY choose
among the three of you?
The Big Bang Theory Season 11, Episode 12