If you want to be a lawyer, or if you want to be an engineer or a medical practitioner. You have to receive the knowledge from the authoritative lawyer, authoritative engineer. Of course, I do not know what is the custom here. In India the custom is that a new lawyer, he has to become an apprentice of an experienced lawyer before he is given the license to practice. That is the Indian system. So any knowledge, unless we receive it through the authoritative sources, it is not perfect. It is not perfect.
There are two kinds of processes of acquiring knowledge. One process is deductive, and the other process is inductive. Those who are staunch student of logic, you know that there are two processes: deductive knowledge and inductive knowledge. Deductive knowledge is considered to be more perfect. And what is that? Just like "Man is mortal." This is a truth, accepted. How man is mortal, nobody's going to enter into discussion. It is accepted that man is mortal. Now, Mr. Johnson is a man, so he is mortal. This is the deductive conclusion. Because man is mortal and Johnson is a man, therefore he's mortal. This is the process of deductive knowledge.