The question for the day, how closely related are these two contentions, by MP: 1. "While tacit knowledge can be possessed by itself, explicit knowledge must rely on being tacitly understood and applied. Hence all knowledge is either tacit or rooted in tacit knowledge. A wholly explicit knowledge is unthinkable." 2. "The information in DNA could no more be reduced to the chemical than could the ideas in a book be reduced to ink and paper: something beyond physics and chemistry encoded DNA."