A philosophy professor walks in to give his class their final. Placing his chair on his desk the professor instructs the class, "Using every applicable thing you've learned in this course, prove to me that this chair DOES NOT EXIST."
So, pencils are writing and erasers are erasing, students are preparing to embark on novels proving that this chair doesn't exist, except for one student. He spends thirty seconds writing his answer, then turns his final in to the astonishment of his peers.
Time goes by, and the day comes when all the students get their final grades ... and to the amazment of the class, the student who wrote for thirty seconds gets the highest grade in the class.
The teacher of the earth science class was lecturing on map reading.
After explaining about latitude, longitude, degrees and minutes the teacher asked, "Suppose I asked you to meet me for lunch at 23 degrees, 4 minutes north latitude and 45 degrees, 15 minutes east longitude?"
After a confused silence, a voice volunteered, "I guess you'd be eating alone."
Two engineering students meet on campus one day. The first engineer calls out to the other, "Hey nice bike! Where did you get it?" "Well," replies the other, "I was walking to class the other day when this pretty, young coed rides up on this bike. She jumps off, takes off all of her clothes, and says 'You can have anything you want!'" "Good choice," says the first, "her clothes wouldn't have fit you anyway."
A lecturer teaching medicine was giving a classoom observation. He took out a jar of yellow liquid. "This," he explained, "is urine. To be a doctor, you have to be observant of color, smell, sight, and taste."
After saying so, he dipped his finger into the jar and put it into his mouth. His class watched in amazement, most in disgust. But being the good students that they were, the jar was passed, and one by one, they dipped their finger into the jar and put it into their mouths.
After the last student was done, the lecturer shook his head. "If any of you had been observant, you would have noticed that I put my second finger into the jar and my third finger into my mouth."