 Sometimes agents act in ignorance of the likely bad consequences of their actions, and sometimes their ignorance excuses them from blame for so acting. But in other cases, an agent’s ignorance might not excuse him. How can we distinguish the cases where ignorance excuses from those in which it does not? One proposal is that ignorance fails to excuse when the ignorance is itself something for which an agent might be blamed. And one proposal for when ignorance is blameworthy is that it issues from a blameworthy benighting act in which an agent culpably impairs, or fails to improve, his own epistemic position (H. Smith 1983). In such a case, the agent’s ignorance seems to be his own fault, so it cannot be appealed to in order to excuse the agent.