I once heard a story: Some people loved to tease a fool. They would often toss him coins of one dollar and fifty cents, but the fool would only pick up the fifty-cent coins, never the one dollar. After watching him collect all the coins, they would burst into laughter, mocking him for not being able to tell the difference between a dollar and fifty cents. The fool didn't argue; he just grinned foolishly and took a handful of fifty-cent coins. A kind person secretly told the fool, "From now on, you should pick up the one-dollar coins; a one-dollar is worth more than a fifty-cent." The fool seriously replied, "If I pick up the one-dollar coins, will they still toss me coins?" So, who is the fool really?