Abstract

John Martin Fischer argues that a version of the Consequence Argument that invokes a principle he calls the ‘Principle of the Fixity of the Past and Laws’ is immune to the broadly Lewisian response that the compatibilist can make to the ‘conditional’ version of the argument. In his contribution to this volume, he argues—in part by appealing to backtracking counterfactuals—that denying PFPL leads to trouble, specifically, for the fixed-laws compatibilist. I argue on behalf of the fixed-laws compatibilist that his argument fails: true backtrackers of the kind Fischer’s argument needs are harder to come by than Fischer supposes, and in any case their truth is not something that can be known, prior to decision, by the deliberating agent.