Oh, he's not coming out
until he sees PROOF
The Big Bang Theory Season 7, Episode 17
So, you know, I don't really
have any, like, PROOF or anything.
Breaking Bad Season 5, Episode 12
quite the opposite,
if the PROOF of life failed,
Money Heist Season 1, Episode 10
It's PROOF of concept.
The Big Bang Theory Season 9, Episode 24
Uh, we have PROOF that you
plagiarized your thesis.
The Big Bang Theory Season 12, Episode 21