"A young man gets on a train and sits down next to an older man. The younger one asks, "Can you tell me the time?" and the man says "No." "What do you mean, no?" the younger one says. "If I tell you the time we will have to get into a conversation. You'll ask me where I'm going. I'll ask you where you're going. It will turn out we're going to the same place. I'll have to invite you for dinner. I have a young marriageable daughter, and I don't want my daughter to marry someone who doesn't wear a watch." Lecture 12, On Questions, Harvey Sacks.