
The CORRECT answer is, "When covered by
liquid sufficient to reduce the coefficient...
The Big Bang Theory Season 2, Episode 5

Correct.
The Big Bang Theory Season 1, Episode 13

There are three answers,
none of which are CORRECT.
The Big Bang Theory Season 2, Episode 5

if you didn't CORRECT me
all the time.
The Big Bang Theory Season 11, Episode 15

Is that CORRECT?
Breaking Bad Season 2, Episode 5