 Hempel and Oppenheim (1948) raise several objections to Emergentism. Brief attention to two of their objections will help bring out at least a couple of the many facets of Broad’s subtle account. Firstly, to assume that emergent phenomena exist is to assume that there are certain phenomena that have “a mysterious quality of absolute unexplainability”. They confidently assert that “emergence […] is not an ontological trait inherent in some phenomena; rather it is indicative of the scope of our knowledge at a given time” (p. 119). This objection in effect implies that the metaphysical notion of emergence is dismissed in favour of a strongly epistemic notion.