As a scientist, I reach conclusions
BASED on observation and experimentation.
The Big Bang Theory Season 1, Episode 10
So, does Penny know
you BASED a character on her?
The Big Bang Theory Season 11, Episode 15
...BASED on data I collected
watching my parents' marriage implode.
The Big Bang Theory Season 4, Episode 20
Based on your cost of materials
and your wholesale selling price...
The Big Bang Theory Season 2, Episode 18
And sonar is BASED on bats.
The Big Bang Theory Season 11, Episode 8