Eric: So, looks like I'm gonna spend the weekend with Kelso, tutor him in math.
Red: Really.
Kitty: Hmmm.
Red: So, you're allegedly tutoring Kelso in math?
Eric: Yes sir.
Kitty: Are you good in math?
Red: What's the square root of x?
Eric: Um, I really can't answer that?
Red: A-HA!
Eric: No, see. X is a variable so until you define its parimeter is the only possible answer is the variable or x if you prefer.
Red: Is that right?
Kitty: Sounds good. Will Michael's parents be home?
Eric: Yes.
Red: Are they as dumb as he is?
Eric: I can't lie. Yes. Yes, they are.
Red: Right answer. (to Kitty) That was a trick question. I know they're dumb
Eric: So, I can go?
Red: You can go, but I'll be watching the news. And if anything gets vandalized, or explodes, or catches on fire, X is gonna equal me kicking your ass.

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