...people unfamiliar with the law
of large numbers would call a COINCIDENCE.
The Big Bang Theory Season 1, Episode 4
What a COINCIDENCE.
It's the future Mrs. Wolowitz.
The Big Bang Theory Season 2, Episode 7
Huh? Can't be a COINCIDENCE.
The Big Bang Theory Season 1, Episode 12
It's an amazing COINCIDENCE.
Can we leave it at that?
The Big Bang Theory Season 3, Episode 3
were identical by COINCIDENCE,
The Big Bang Theory Season 5, Episode 14