 The third reply, that after noting the altimeter evidence one isn’t justified in believing that one’s evidence supports F and also isn’t justified in believing F has the virtue of caution but also the consequence that the altimeter evidence deprives you of justification for believing F even if you do not suffer from hypoxia, which Feldman takes to be problematic. However, this response, unlike the first answer, respects the higher-order evidence; the altimeter evidence gives you some reason to believe that you might suffer from hypoxia, which gives you some reason to believe your evidence does not support F. The misfortune of being deprived of your knowledge even if you don’t actually have hypoxia is an instance of the familiar misfortune of misleading evidence in general. However, as we will see shortly, misleading higher-order self-doubting evidence is distinct from other higher-order evidence, and some recent authors have been led by this to the view that option 1 above—akrasia—can be more rational than option 3 in some cases.