I address Andrew Moon's recent discussion (2016, this journal) of the question whether third-factor accounts are valid responses to debunking arguments against moral realism. Moon argues that third-factor responses are valid under certain conditions but leaves open whether moral realists can use his interpretation of the third-factor response to defuse the evolutionary debunking challenge. I rebut Moon's claim and answer his question. Moon's third-factor reply is valid only if we accept externalism about epistemic defeaters. However, even if we do, I argue, the conditions Moon identifies for a valid third-factor response are not met in the case of moral realism.

中文翻译：

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道德现实主义者能否因道德的进化解释而改变失败？

我解决了安德鲁·穆恩 (Andrew Moon) 最近的讨论（2016 年，本期刊）关于第三因素帐户是否是对揭穿反对道德现实主义论点的有效回应的讨论。Moon 认为第三因素反应在某些条件下是有效的，但道德现实主义者是否可以使用他对第三因素反应的解释来化解进化揭穿挑战。我反驳Moon的说法并回答他的问题。只有当我们接受关于认知失败者的外在主义时，Moon 的第三因素回答才有效。然而，即使我们这样做，我认为，在道德现实主义的情况下，Moon 为有效的第三因素反应确定的条件也没有得到满足。