The truths Phaedrus began to pursue were lateral truths; no longer the frontal truths of science, those toward which the discipline pointed, but the kind of truth you see laterally, out of the corner of your eye. In a laboratory situation, when your whole procedure goes haywire, when everything goes wrong or is indeterminate or is so screwed up by unexpected results you can't make head or tail out of anything, you start looking laterally. That's a word he later used to describe a growth of knowledge that doesn't move forward like an arrow in flight, but expands sideways, like an arrow enlarging in flight, or like the archer, discovering that although he has hit the bull's-eye and won the prize, his head is on a pillow and the sun is coming in the window. Lateral knowledge is knowledge that's from a wholly unexpected direction, from a direction that's not even understood as a direction until the knowledge forces itself upon one. Lateral truths point to the falseness of axioms and postulates underlying one's existing system of getting at truth.
Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values
growth, knowledge, lateral-thinking, truth