  Siegel (2004) also suggests that, properly understood, the epistemic burden incurred by the common element theorist is not so great after all, as it leaves open the possibility that subjects may make all kinds of mistakes about the kinds of experiences they are having. One’s view on whether or not the epistemic commitment that is being attributed to the common element theorist by Martin is excessively burdensome may depend, in part, on how one understands the notion of introspective indiscriminability in play in his argument. This may also affect how plausible one finds the claim that being introspectively indiscriminible from a genuine perception is necessary and sufficient for being a perceptual experience. Martin’s views on these issues are discussed further in section 5.1.