Neighbor 1:  "Hi, there, new neighbor, it sure is a 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."