Tyrion claims he'll have PROOF.
Game of Thrones Season 7, Episode 5
Oh, he's not coming out
until he sees PROOF
The Big Bang Theory Season 7, Episode 17
Without the bedding ceremony,
there's no real PROOF
Game of Thrones Season 3, Episode 9
I have no PROOF, only whispers.
Game of Thrones Season 3, Episode 4
Which is why I'm coming to you.
I need PROOF.
Game of Thrones Season 3, Episode 4