[KenWittlief]

for the final exam in a philosophy class the professor walked in, picked up a chair and put it on the table.

He told the class "your final is an essay - using everything you have learned in this class convince me that this chair does not really exist"

all the students except one started writing furiously, quoting the great philosophers they had studied they laid down their logical arguments for page after page

except that one student. He sat quietly for several minutes, then smiled, scribbled something on a piece of paper for a second - handed it to the professor and walked out.

The other students were stunned that he had left with an hour and a half left - they were even more stunned when the grades were posted later that week, and he received the only A.

They grumbled and organized a mob and marched down to the professor office and demanded to see the 3 second paper that had earned the only A.

The professor gladly complied. There scrawled on the page were only 2 words:

What chair?