Recognize that performance in school doesn’t tell you much about whether a person has the values and abilities you are looking for. Largely because they are the easiest to measure, memory and processing speed tend to be the abilities that determine success in school, so school performance is an excellent gauge of these qualities. School performance is also a good gauge of a person’s determination to succeed, as well as their willingness and ability to follow directions. But when it comes to assessing a candidate’s common sense, vision, creativity, or decision-making abilities, school records are of limited value. Since those traits are the most important, you must look beyond school to ascertain whether an applicant has them.

While it’s best to have great conceptual thinkers, understand that great experience and a great track record also count for a lot. There are all sorts of jobs and they require all types of people to handle them. I am frequently biased toward finding the entrepreneur type—a clever, open-minded scrapper who will find the best solution—and I have often been disappointed. On the other hand, sometimes I have found a master craftsman who has devoted decades to his specialty who I could completely rely on. What keeps coming to my mind is Malcolm Gladwell’s rule that it takes ten thousand hours of doing something to build expertise—and the value of looking at batting averages to judge how well a person can hit. One way you can tell how well a talented rookie will do relative to a proven star is to get them into a debate with each other and see how well they each hold up.
