Deductive Reasoning...
Neighbor 1: "Hi, there, new neighbor, it sure is a mighty nice day to be
moving"
New Neighbor: "Yes, it is and people around here seem extremely
friendly"
Neighbor 1: "So what is it you do for a living?"
New Neighbor: "I am a professor at the University, I teach deductive
reasoning"
Neighbor 1: "Deductive reasoning, what is that?"
New Neighbor: "Let me give you and example. I see you have a dog house
out back. By that I deduce that you have a dog."
Neighbor 1: "That is right"
New Neighbor: "The fact that you have a dog, leads me to deduce that you
have a family"
Neighbor 1: "Right again"
New Neighbor: "Since you have a family I deduce that you have a wife"
Neighbor 1: "Correct"
New Neighbor: "And since you have a wife, I can deduce that you are
heterosexual."
Neighbor 1: "Yup"
New Neighbor: "That is deductive reasoning"
Neighbor 1: "Cool"
Later that same day
Neighbor 1: "Hey, I was talking to that new guy who moved in next door"
Neighbor 2: "Is he a nice guy?"
Neighbor 1: "Yes, and he has an interesting job"
Neighbor 2: "Oh, yeah what does he do?"
Neighbor 1: "He is a professor of deductive reasoning at the University"
Neighbor 2: "Deductive reasoning, what is that"
Neighbor 1: "Let me give you an example. Do you have a dog house?"
Neighbor 2: "No"
Neighbor 1: "Fag."