...because you can't conceive of something
that you are not an EXPERT in.
The Big Bang Theory Season 2, Episode 9
...and, well, you seem to be an EXPERT
at ending them.
The Big Bang Theory Season 2, Episode 6
...you're an EXPERT on rings.
The Big Bang Theory Season 8, Episode 24
Why be polite to the world's leading
EXPERT on the dung beetle?
The Big Bang Theory Season 3, Episode 2
But the thing is that everyone
is an EXPERT in something.
Money Heist Season 1, Episode 11