
Assuming that's a VALID reason not to go,
which it isn't...
The Big Bang Theory Season 2, Episode 23

That was a VALID hypo...?
What is happening to you?
The Big Bang Theory Season 1, Episode 1

That is a VALID point.
The Big Bang Theory Season 10, Episode 19

No, it was a VALID hypothesis.
The Big Bang Theory Season 1, Episode 1

A VALID point, but unoriginal. B-minus.
The Big Bang Theory Season 8, Episode 2