
...for the EXISTENCE
of galactic dark matter.
The Big Bang Theory Season 2, Episode 11

I'm denying its EXISTENCE.
Game of Thrones Season 2, Episode 2

If you guys prove the EXISTENCE
of Unruh radiation...
The Big Bang Theory Season 7, Episode 2

...the terms of your metaphor
by acknowledging her EXISTENCE. I'm out.
The Big Bang Theory Season 2, Episode 8

...which posits the EXISTENCE of infinite
Sheldons in an infinite number...
The Big Bang Theory Season 3, Episode 3