
That's sort of like
the uncertainly PRINCIPLE.
The Big Bang Theory Season 4, Episode 20

of Heisenberg's
uncertainty PRINCIPLE,
The Big Bang Theory Season 5, Episode 5

should avoid espousing
the PRINCIPLE
The Big Bang Theory Season 7, Episode 22

The holographic PRINCIPLE suggests...
The Big Bang Theory Season 6, Episode 5

Raj, where do you stand
on the anthropic PRINCIPLE?
The Big Bang Theory Season 6, Episode 1