 There may be no problem about mystics knowing they had PCEs. If we accept a reliabilist account of knowledge, a belief is knowledge if produced by a reliable cognitive mechanism (perhaps with some further conditions). In order to have knowledge, a person does not have to be aware of and judge evidence, nor be cognizant of the reliability of the mechanism that produces the knowledge. Hence, “awakening” from what is in fact a PCE, if it produces the belief that one has “awakened” from a PCE, could be a reliable cognitive mechanism sufficient for knowing one had had a PCE. If we stick to an evidentialist conception of knowledge, mystics might be able to have evidence they had undergone a PCE, though not at the time of its occurrence, since a conscious event can have elements that one does not note at the time but recalls afterward. This is especially possible when the recall immediately follows the event. That is, some content was retained and the experience was not truly empty, even if the content is only a nondual consciousness. Therefore, it should be possible for a mystic who undergoes a PCE to recall immediately afterward the awareness that was present in the PCE, even though that awareness was not an object of consciousness at the time of the PCE.