
In Leonard's defense,
it wasn't for LACK of trying.
The Big Bang Theory Season 2, Episode 10

When soldiers LACK discipline,
the fault lies with their commander.
Game of Thrones Season 1, Episode 9

Okay, the Nordic reputation for
LACK of humor is well-founded.
The Big Bang Theory Season 7, Episode 5

...which results
from a LACK of rules and competition.
The Big Bang Theory Season 1, Episode 6

LACK the ability to
sense temperature.
The Big Bang Theory Season 5, Episode 13