" We don't usually see that there's a third possible logical term equal to yes and no, which is capable of explaining our understanding in an unrecognized direction. We don't even have a term for it, so I'll have to use the Japanese "Mu." Mu means no thing, like quality, it points outside the process of dualistic discrimination. Mu simply says, no class, not one, not zero, not yes, not no. It states that the context of the question is such that a yes or no answer is an error and should not be given. Un-ask the question is what it says. Mu becomes appropriate when the context of the question becomes too small for the truth of the answer. "

― Robert Prisig