Studying knowledge is something philosophers have been doing for as long as philosophy has been around. It’s one of those perennial topics—like the nature of matter in the hard sciences--that philosophy has been refining since before the time of Plato. The discipline is known as epistemology which comes from two Greek words episteme (episthmh) which means knowledge and logos (logoV) which means a word or reason. Epistemology literally means to reason about knowledge. Epistemologists study what makes up knowledge, what kinds of things can we know, what are the limits to what we can know, and even if it’s possible to actually know anything at all.
At first this might seem like one of those topics that gives philosophy a bad name. After all, it seems kind of silly to ask whether we can know anything since is obvious we do. It's even more silly when you consider that to even ask the question, you must assume you know something! So why have some of the greatest minds the world has ever produced spent such a great deal of time on the subject? In this article I’ll consider this question.