"A PROOF that algebraic topology...
The Big Bang Theory Season 6, Episode 3
All right, Hofstadter, here's
all the PROOF you need.
The Big Bang Theory Season 12, Episode 21
You want PROOF?
I can make some calls.
The Big Bang Theory Season 12, Episode 21
quite the opposite,
if the PROOF of life failed,
Money Heist Season 1, Episode 10
He's discovered PROOF
Game of Thrones Season 7, Episode 2