Some philosophers working on the metaphysics of agency argue that if agency is understood in terms of settling the truth of some matters, then the power required for the exercise of intentional agency is an irreducible two-way power to either make it true that p or not-p. In this paper, the focus is on two-way powers in decision-making. Two problems are raised for theories of decision-making that are ontologically committed to irreducible two-way powers. First, recent accounts lack an adequate framework (...) for explaining decisions by the reasons of agents. Second, accepting ontologically irreducible two-way powers into one’s metaphysic of agency implies an ontological commitment to substance dualism. An ontologically less-costly alternative to irreducible two-way powers is offered. It is argued that a reductive account of two-way powers in terms of what George Molnar called “derivative powers” should be accepted. The reductive account can provide us with the truthmakers for talk about two-way powers. Moreover, the reductive account does not share the liabilities of accepting irreducible two-way powers. (shrink)