In a recent exchange in this journal, I argue that accounts of emergence face the collapse problem, and I defend an explanatory approach to emergence as a solution to this problem. Alexander Skiles objects to my account, and proposes an alternative solution to the collapse problem. In this discussion note I take up this conversation, defending the explanatory account of emergence against Skiles’ critique, and arguing that his alternative approach fails to solve the collapse problem.

Some claim that the notion of strong emergence as involving ontological or causal novelty makes no sense, on grounds that any purportedly strongly emergent features or associated powers 'collapse', one way or another, into the lower-level base features upon which they depend. Here we argue that there are several independently motivated and defensible means of preventing the collapse of strongly emergent features or powers into their lower-level bases, as directed against a conception of strongly emergent features as having fundamentally novel (...) powers. After introducing the project (Section 1), we motivate and present the powers-based account (Section 2); we then canvass the two main versions of the collapse objection, show how these apply to the powers-based account, and problematize certain strategies of response (Section 3); we then present and defend four better strategies of response (Section 4). (shrink)