Trek question

( Potential plot hole in TOS, 'The Enemy Within' )

A quote that would make Sir Humphrey Appleby proud...

There are known knowns. These are things we know that we know. There are known unknowns. That is to say, there are things that we know we don't know. But there are also unknown unknowns. There are things we don't know we don't know.

--Donald Rumsfeld

Hacker: "Now why did you think I wouldn't want to hear that?"

Sir Humphrey: "I thought it might upset you."

Hacker: "How could it? I didn't understand a single word!"