You can think about Heisenberg's
uncertainty PRINCIPLE...
The Big Bang Theory Season 4, Episode 20
I know what the anthropic PRINCIPLE is.
The Big Bang Theory Season 6, Episode 1
...the PRINCIPLE that a physical system exists
partially in all its possible states at once.
The Big Bang Theory Season 6, Episode 19
The holographic PRINCIPLE suggests...
The Big Bang Theory Season 6, Episode 5
...most accurate visualization
of a scientific PRINCIPLE.
The Big Bang Theory Season 1, Episode 6