All right, Hofstadter, here's
all the PROOF you need.
The Big Bang Theory Season 12, Episode 21
{\i1}That's the irrefutable PROOF of my love,{\i0}
Money Heist Season 3, Episode 4
"A PROOF that algebraic topology...
The Big Bang Theory Season 6, Episode 3
quite the opposite,
if the PROOF of life failed,
Money Heist Season 1, Episode 10
finds PROOF of alien life.'
The Big Bang Theory Season 12, Episode 20