All Sciences in General
Indeed, you also agree that obtaining all sorts of knowledge is not only impossible for a single person, but it is not even necessary. What is the necessity for a physician to be proficient in all medical fields, also in engineering, mechanical, chemistry, or physics? This is neither possible nor useful since responsibilities are divided throughout society. If this were the case, then how could a physician or an engineer make money, and what would be the point? We witness a similar pattern in the human body where the responsibilities are assigned to various organs. For instance, the eye cannot carry out the tasks designated for ear and nose and mouth and other senses alongside with its dedicated responsibility. Boundaries and responsibilities are all carefully assigned.