The Professor's Brain

During one of a professer's routine classes, he decided to raise
a controversial subject:


He stood in front of his class and said: "Can anyone hear God?
Can anyone see God? Can anyone smell God?" After a long pause,
the professor concluded: "Because none of you can hear, see, or
smell God, I conclude that there is no God."


Not to be outdone, one particularly potent student stood up.
"May I address the class directly?" he asked.


"Yes, you may," the professor replied.


The student went to the front of the class and began: "Can
anyone hear the professor's brain? Can anyone see the
professor's brain? Can anyone smell the professor's brain?"
After a particularly uneasy and long pause, the student
finished: "Because none of you can hear, see, or smell the
professor's brain, I conclude that the professor has no brain."