Philosophy

I am trying to understand the idea behind the question of the meaning of knowledge. I'm confused by why the usual meaning of something we remember having encountered before requires further definition. I guess I'm asking if philosophy has no acceptance of the usual common meanings? How does such a definition as "true verifiable belief" (if I remember that right) satisfy more than our commonly shared meaning? After all, I have knowledge of a lifetime of experiences and feelings and impressions and ideas that cannot possibly satisfy those criteria. Does that mean that philosophers claim that my memories are not knowledge? I have the same problem understanding the need for "defining" existence as {I think therefore I am." It seems more sensible to me to reword it as "I am therefore I think." Can you explain the most basic conception of philosophical inquiry? Is it simply a game?

Comments

To answer your last question first: I don't regard philosophical inquiry as a game. On the contrary, it may well be the most intellectually serious form of inquiry there is. What philosophical inquiry amounts to is itself a matter of philosophical controversy, but I'm inclined to say that philosophical inquiry consists in thinking as carefully as we can about the most general and most fundamental questions we can ask.

To your other questions:

1. The definition of "knowledge" -- more accurately, the analysis of the concept of knowledge -- has been an energetically disputed topic in philosophy for more than 50 years. Some philosophers defend a version of the "true, justified belief" analysis, with "justified" understood in a variety of ways. Others defend an analysis that doesn't require anything they're prepared to call "justification." Still others think that it's a mistake to try analyzing the concept of knowledge into "more basic" concepts. You'll find much useful information about all of this in the SEP entry on the analysis of knowledge, available at this link.

2. I don't believe that Descartes meant his "I think; therefore, I am" to be a definition of existence. Instead, it's supposed to be an indubitable piece of reasoning, or else an indubitable unitary thought, rather than a definition of a term or an analysis of a concept. Notice, by contrast, that "I am; therefore, I think" doesn't seem indubitable: at any rate, it's not valid reasoning, since it's possible for a person to exist (in a coma, perhaps) and not be thinking.

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