He makes a VALID point!
The Big Bang Theory Season 8, Episode 3
No, it was a VALID hypothesis.
The Big Bang Theory Season 1, Episode 1
...where a tray of flatware
on a couch is VALID?
The Big Bang Theory Season 1, Episode 2
A VALID point, but unoriginal. B-minus.
The Big Bang Theory Season 8, Episode 2
Assuming that's a VALID reason not to go,
which it isn't...
The Big Bang Theory Season 2, Episode 23