You have all these fragments, like pieces of a puzzle, and you can place them together into large groups, but the groups don't go together no matter … - Robert M. Pirsig

The Professor of Philosophy seems quite aware of what has happened. His previous little eye-flick of malice toward Phædrus has turned to a little eye-flick of fear. He seems to understand that within the present classroom situation, when the time comes, he can get exactly the same treatment he gave, and there will be no sympathy from any of the faces before him. He's thrown away his right to courtesy. There's no way to prevent retaliation now except to keep covered.

Quality ... you know what it is, yet you don't know what it is. But that's self-contradictory. But some things are better than others, that is, they have more quality. But when you try to say what the quality is, apart from the things that have it, it all goes poof! There's nothing to talk about. But if you can't say what Quality is, how do you know what it is, or how do you know that it even exists? If no one knows what it is, then for all practical purposes it doesn't exist at all. But for all practical purposes it really does exist. What else are the grades based on? Why else would people pay fortunes for some things and throw others in the trash pile? Obviously some things are better than others ... but what's the betterness? ... So round and round you go, spinning mental wheels and nowhere finding anyplace to get traction. What the hell is Quality? What is it?

If Quality were dropped, only rationality would remain unchanged.