As with anything we want to do in this world, we must learn how to do it. We attend college or a trade school when we want to learn a career and then earn a degree or certificates. Such proves our efforts and shows we are familiar about the topic we studied. We often take classes, too, when we want to drive a car or especially a large truck. Again, we earn a certificate or diploma. It shows we know how to operate the vehicle and are familiar with how it works. And, if we want to operate an even more complicated machine, be it a boat or airplane, we have no choice - we must take classes. They are much too complicated ... Read more »