So the good news for rationalist anti-Mooreans is that the dialectical inefficacy diagnosis does indeed condemn Moorean arguments and has quite a bit of initial plausibility. The bad news, though, is that it also spells trouble for rationalism. The reason why is clear enough: nothing a rationalist can say will have any dialectical force against someone convinced of VMN. In particular, any claim that not-VMN is a priori will lack dialectical force. So, the dialectical inefficacy account entails Manipulative-2b, and thus that Manipulative 1–5 is a sound argument. The dialectical inefficacy diagnosis entails the Same Boat Hypothesis.
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