It's proof of CONCEPT.
The Big Bang Theory Season 9, Episode 24
is an abstract CONCEPT...
Game of Thrones Season 1, Episode 6
Do you understand
the CONCEPT of blackmail?
The Big Bang Theory Season 1, Episode 16
I find the CONCEPT of coitus ridiculous
and off-putting.
The Big Bang Theory Season 6, Episode 20
so the CONCEPT of a bastard
doesn't exist.
Game of Thrones Season 7, Episode 4