
...and since Howard and Bernadette are
married, INTELLECTUAL property in the letter...
The Big Bang Theory Season 6, Episode 19

...as a purely INTELLECTUAL exercise.
The Big Bang Theory Season 2, Episode 13

You're just clinging to it
out of INTELLECTUAL stubbornness.
The Big Bang Theory Season 6, Episode 9

I have a brother and sister
whose combined INTELLECTUAL wattage
The Big Bang Theory Season 10, Episode 12

...I have to give up everything I believe in?
My INTELLECTUAL integrity?
The Big Bang Theory Season 3, Episode 12