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