 If despite being at an altitude of 10,500 feet our pilot did do the calculation correctly, then her first-order evidence deserved her belief and her evidence from her altitude and the phenomenon of hypoxia was a misleading defeater. It was good reason to worry that her blood oxygen was low, but it might not have been low, and it would be possible in principle for her to get further evidence that would support this view, such as from the reading of a finger pulse oximeter. Misleading defeaters are not new, but few would be tempted to say in the case where one gets evidence that the light is red that it would be rational for the subject to believe both “my evidence doesn’t support the claim that the cloth is red” and “the cloth is red”. However, for self-doubting type II defeaters several authors have claimed that such level-splitting can be rational.