A college professor says to his students,"Logical deducation is the
art of making a natural series of assumptions based on one fact in
order to prove another fact.I'll illustrate.Mr.Norris,do you have a
dog?"
Norris says,"Yes,I do."
The professor says,"I deduce that because you have a dog,you have a
backyard?"
Norris says,"Yes,I do."
The professor says,"You have a backyard,so you have a house?"
Norris says,Yes."
The professor says,"Because you have a house,I deduce that you don't
live alone?"
Norris says,"Right again."
The professor says,"And because you don't live alone,I deduce that you
have a wife?"
Norris says,Yes,I have a wife."
The professor says,"And because you have a wife,I deduce that you are
not a homosexual."
Norris says,"No,I'm not."
After class,one of Norris' dormmates says,"What did you study in that
'Logical Deductions'class?"
Norris says,"I'll show you.Do you have a dog?"
The guy says,"Nope."
Norris says,"You fucking faggot!"