Using the Wrong Standard
A little boy walked into the kitchen and told his mother that he discovered he was six feet tall. When she asked how he had determined this, he told her he had used his shoe to measure and that he was six shoes tall. With a loving smile she told him that his shoe was not a foot long. He insisted, “But, Mom, it’s got to be ’cause my foot’s in it!”
Many people believe they are pretty good because they are using a faulty standard.