
...the success or failure of the date would
be BASED on the biochemical reaction...
The Big Bang Theory Season 1, Episode 3

a relationship BASED on honesty.
The Big Bang Theory Season 7, Episode 21

Hint: it's BASED
on Sanskrit,
The Big Bang Theory Season 12, Episode 2

Based on the number of chirps
per minute and the temperature...
The Big Bang Theory Season 3, Episode 2

...and BASED on living next to you
for three years...
The Big Bang Theory Season 4, Episode 1