- Keen observation, goodbye.
- You see where you went wrong, don't you?
The Big Bang Theory Season 1, Episode 12
...your mind has lost its KEEN edge.
The Big Bang Theory Season 4, Episode 22
You have a KEEN military mind, Pod.
Game of Thrones Season 6, Episode 8
You have a KEEN insight
into the human heart,
The Big Bang Theory Season 5, Episode 13
As a man with a KEEN
sense of style,
The Big Bang Theory Season 5, Episode 2