Any form of divination can be intuitively compelling without the need for ontological elaboration, but practices like Chinese six lines prediction involve complex ontological accounts, raising the question of what effect this has on divination’s authority and persuasiveness. The explicit ontology of six lines prediction appears to make it especially persuasive, because it provides a coherent model of epistemology and causation that is readily comparable to scientific observation and description based on constant principles. Meanwhile, six lines prediction’s mathematical character adds to its intuitive authority. By relying on a predetermined system of correlates, it creates the impression that the diviner is not the source of the divinatory result or its interpretation. This likely allows six lines prediction to flourish in an environment in which it is officially classified as ‘superstition’.