In ancient Greece, a philosopher used to teach The art of argumentation. He was such an accomplished master of his profession that he offered his pupils to pay him fees of the course only if they win their first argument; moreover he started offering double the amount as a promotion program to anyone who lost his first argument after having spent the time required to finish the course under his tutelage. The amazing thing was: he never had to pay back to any disciple.
A very curious looking disciple with broad forehead and radiant face joined him one day. He was very quiet and refined in appearance. He rarely asked any questions and mastered the art of argumentation very quickly with ease. When the day of examination came, to the astonishment of entire country, instead of challenging anyone else, the disciple challenged the revered and renowned guru of Sophistry. Guru could not reject the challenge, because, in that case his reputation would have decimated.
The disciple’s argument was that he did not owe any money to the Guru. The Guru had an unforeseen dilemma before him. If he refuted the assertion to win the argument he had to pay twice the amount to the disciple because of his contract and had he lost the argument by being slack he had to part with the fame that years upon years of Sophistry had earned him. He was going to lose both ways.
Guru chose fame over money after pondering for a while and disciple grabbed double the amount of his fees. Disciple paid the fees and took the rest of the money and Sophistry in his baggage and went to a far away land.