Long ago there were two brothers Hing and Ming. One day their pet chicken fell ill, began to molt, and soon lost all of its feathers! The brothers decided to each spend two months trying to cure the chicken.
Hing immediately went back to the university and, having boned up on ornithology and traditional Chinese medicine, he decided that the answer was a prescription of gum-tree leaf tea. He gathered bushels of the tea leaves, brewed gallons of the tea, and poured it into the chicken for the two months.
Meanwhile, Ming traveled all around China, praying at the shrines of his ancestors. One night he had a dream. His ancestors appeared and told him to feed the chicken tea made from gum-tree leaves! Ming, aware of his brother's lack of success, decided that the problem was quantity. He gathered whole cartloads of leaves, and brewed barrels of the tea, and nearly drowned the poor chicken over another two month period.
At the end of that time, the dismal chicken was still as naked as a bowling ball.
Moral: All of Hing's courses, and all of Ming's kin; couldn't make gum tea re-feather a hen!
(Please - no 'mingin' comments)