
I am a published THEORETICAL physicist
with two doctorates...
The Big Bang Theory Season 2, Episode 2

Is it maybe because, like Sheldon's work,
your sex life is also THEORETICAL?
The Big Bang Theory Season 6, Episode 9

Theoretical physicists do not get canned.
The Big Bang Theory Season 1, Episode 4

...I would've become a THEORETICAL physicist.
The Big Bang Theory Season 8, Episode 7

You're summa cum laude in THEORETICAL
physics from Stanford University.
The Big Bang Theory Season 6, Episode 3