I don't know but I can look it up for you."
I don't know, ask Dave.
Preferably really dark or 'just plain wrong' jokes.
A: Two: One to hold it one to hammer it in.
A girl raises her hand and says, "I don't know. I've never been bolted before."
Alex: I'm sorry. The answer we were looking for is, Whatever.
Normal day at the office, when one guy notices his coworker distraught. He goes over to his cubicle and sees him looking for something on the floor. They spend half an hour looking for it, when the guy starts picking his nose:
69
One
Because actions speak louder than words.
A: According to the Gooey Decimal System.