That's actually a VALID example.
The Big Bang Theory Season 8, Episode 21
...scientifically VALID protocol
that will make our lives better?
The Big Bang Theory Season 3, Episode 3
Assuming that's a VALID reason not to go,
which it isn't...
The Big Bang Theory Season 2, Episode 23
It was sparsely sourced,
but I think the science is VALID.
The Big Bang Theory Season 1, Episode 3
That is not a VALID order.
Game of Thrones Season 6, Episode 8