Resolving a puzzle about moral responsibility and logical truth

Lampert and Waldrop have recently presented a puzzle about moral responsibility and logical truth, in which they derive a contradiction from three apparently plausible principles: (A) no one is responsible for any logical truth; (B) if no one is responsible for something, then no one is responsible for what it strictly implies; and (C) someone is responsible for something. They argue that, in response, we must give up (B)—a principle that plays a key role in arguments for incompatibilism. In this paper, I argue that this response is mistaken, and that the lesson to be drawn lies elsewhere. For the puzzle also rests on a conception of logical truth according to which there are contingent logical truths. And, given this conception, (A) is false—for reasons independent of (B). So the import here concerns, not a connection between responsibility and the debate over incompatibilism, but a connection between responsibility and the debate over the correct conception of logical truth: one can hold on to (A), or hold on to the relevant conception of logical truth, but not both.