
"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