"The Thing To Do" Implies "Can"

This article argues that (TDC) is entailed by important but underappreciated truths about practical reason, and that it is not vulnerable to the familiar complaint. This is interesting in its own right. The author suggests that it has interesting (though by no means straightforward) implications for (OC). Precisely what it implies for (OC) depends on the relation between claims about what we ought to do and claims about the thing to do--in particular, whether the former imply the latter. If they do, then the argument for (TDC) is offered also suggests a novel argument for (OC) and a novel response to the familiar complaint. If they don't, then (TDC) naturally suggests a novel error theory of (OC).