Penny's emotional responses originate in the
PRIMITIVE portion of brain, the amygdala.
The Big Bang Theory Season 1, Episode 17
Our combined skin cells are now
a PRIMITIVE neural network.
The Big Bang Theory Season 10, Episode 8
It's PRIMITIVE, no better than the hill tribes.
Game of Thrones Season 1, Episode 3
Yeah. It was PRIMITIVE.
Breaking Bad Season 5, Episode 8