  If one does allow that conscious mental events of different kinds (e.g., perceptual experiences and perceptual imaginings) can be introspectively indiscriminible, then it seems that one’s defence of the claim that perfect hallucinations and genuine perceptions are events of the same fundamental kind cannot simply appeal to the fact that they are introspectively indiscriminible. One might, nonetheless, think that there is introspective support for the claim that genuine perceptions have phenomenal properties which are such that (i) an event’s possession of them is independent of the conditions of perception, and (ii) an event’s possession of them is sufficient to account for the fact that the event is introspectively indiscriminible from a genuine perception. One might then simply define ‘perfect hallucinations’ as those experiences that are not genuine perceptions, but which have the same phenomenal properties as genuine perceptions. (See section 3.3 for discussion of Martin’s positive argument for Naïve Realism, which can be seen as an attempt to challenge such claims.)