A short review by Ralph Griswold of Stephen Wolfram's 'A New Kind of Science' (2002), written from the viewpoint of weavers and pattern designers with a mathematical bent. After general comments on Wolfram and the book's style and claims, it describes three pattern-generating systems from the book: cellular automata, block substitution, and constraint systems. It relates these to drawdowns, plain weave and twills, and as sources of new weave designs.