  Suppose we answer that this does not follow—i.e., we accept that it may be possible, in principle, for there to occur a conscious mental event that is introspectively indiscriminible from a genuine perception, but which does not have the same phenomenal properties as a genuine perception. Should we say that such events count as perceptual experiences? If one denies that such mental events should be regarded as perceptual experiences, then, Martin suggests, one owes some kind of justification for this denial, for this stance on what is required for a mental event to be a perceptual experience will seem, from a common sense perspective, to be too restrictive. On the other hand, if one holds that such mental events should be regarded as perceptual experiences, then this suggests that our most inclusive notion of what it is for something to be a perceptual experience is an epistemic one—that of being introspectively indiscriminible from a genuine perception—which does not involve the further metaphysical assumption that perceptual experiences which aren’t genuine perceptions must have the same phenomenal properties as genuine perceptions.