I can tell what kind of medicine a physician practices by the way his secretary answers the telephone.
"What did you say your name was?"
"Who?"
"What?"
"He ain't in."
"Yes, of course. He is in but can't come to the phone. I can have him call you right back." (Then he does.)
"He's not in, but I'll get in touch with him, and he'll call you right back."
"Yes. One moment."