
But we got you a B-minus on purpose
to make it BELIEVABLE.
The Big Bang Theory Season 6, Episode 6

Sure, you can. You're doing fine.
It's very BELIEVABLE.
The Big Bang Theory Season 4, Episode 6

and sympathetic and,
most of all, completely BELIEVABLE.
Breaking Bad Season 4, Episode 4

And you want a BELIEVABLE story.
Breaking Bad Season 3, Episode 12

Believable?
The Big Bang Theory Season 6, Episode 6