Do you exist?

What does ancient Greek philosophy and literature have in common? More than you'd think. They both use what can be called negative demonstrations; that is, they both prove a mode of life by showing how NOT to live. In literature, the character (who, by the way, is an autobiographical character of the author) goes through a journey in which, by the end of the book, he learns of his futile attempts at self-pride and accepts that humanity is all the same. Plato used this method as well, to great effect. In his 38 dialogues, the character cannot define what something is. You can see it as a self-dialogue; assume something exists and then try to say what it is. You can't...

Well, at least you can't "say" what it is. But does that mean it doesn't exist?