Commentary During the 1920s, there was a debate in China between science and the school of metaphysics. “Metaphysics,” in this context, has a different meaning: it refers to traditional Chinese mysticism, of which one salient example is, of course, I-Ching (易經). Shen Yuting (沈有鼎 1908–1989), a pioneer mathematical logician, was also a leading exponent of I-Ching….