"The professional makes as many mistakes as the amateur," he said, swinging a wrench onto the main valve and closing off the fountain, "The difference is, a professional fixes them faster."
--Reported statement by a building superintendent, who was fixing a blast of water from a toilet fitting. The original question was: "You know the difference between a professional plumber and an amateur?"
That's not just conventional wisdom. The research shows that the more you work at learning, the faster you learn. And once you've attained competency, experience enables you to see the errors much quicker and move faster to fix them.
