Study about Justified True Belief and The Gettier Problem

Abstract

To better understand the JTB definition of knowledge, let's go through each of the three elements. First is that the statement must be true. I can't claim to know that Elvis Presley is alive, for example, if he is in fact dead. Knowledge goes beyond my personal feelings on the matter and involves the truth of things as they actually are. Some critics of the JTB definition of knowledge question whether truth is always necessary in our claim to know something. For example, based on the available evidence of the time, scientists in the middle ages claimed to know that the earth was flat. Even though we understand now that it isn't, at the time they had knowledge of something that was false. Didn't they? In response, it may have been reasonable for scientists back then to believe the world was flat, but they really didn't know that it was. Their knowledge claims were premature in spite of how strong their convictions were. This is a trap that we fall into all the time. While talking with someone I may say insistently, "I know that Joe's car is blue!" When it turns out that Joe's car is in fact red, I have to apologize for overstating my conviction. Truth, then, is an indispensable component of knowledge.