Tyrion claims he'll have PROOF.
Game of Thrones Season 7, Episode 5
It's PROOF of concept.
The Big Bang Theory Season 9, Episode 24
We only have PROOF that
they've intercepted communications--
Money Heist Season 3, Episode 4
You want PROOF?
I can make some calls.
The Big Bang Theory Season 12, Episode 21
And if you find the PROOF?
Game of Thrones Season 1, Episode 3