Rachel Kane

The early chapters of this book deal with what the author calls the "dilemma of obligability.". The apparent dilemma is that obligability is not compatible with either determinism or indeterminism. The author believes the dilemma can be avoided by denying the principle that "'ought' implies 'can'," or the principle that obligability entails substitutability. This is because, as the dilemma is presented in the book, it is generated by the assumption that obligability entails substitutability together with arguments to the effect that substitutability is not compatible with either determinism or indeterminism. In support of this latter claim, arguments are marshalled in Chapters 4 and 5 against hypothetical analyses of "could have done otherwise" favored by compatibilists, on the one hand, and against incompatibilist analyses, on the other. Both are found wanting. The author argues that the only way out of the dilemma is to deny that obligability entails substitutability. In Chapter 6, he gives further reasons, involving concrete examples, for denying the "'ought' implies 'can'" principle. Chapters 7 and 8 shift gears somewhat in order to defend a modified ethical intuitionism; and then Chapter 9 returns to the obligability issue, arguing that the ultimate justification for holding persons obligable is that it helps bring about "patterns of behavior deemed socially desirable". The final chapter is a critique of divine command theories of obligability.