 Alternatively, someone with a “disjunctive theory of perception” might insist that the radically deceived subject does not have the same conscious perspective on the world as the successful perceiver (Fish 2013, also the entry on  the disjunctive theory of perception).  On this line of thought, to have the conscious perspective of someone in a case of perceptual success, you need to be in a case of perceptual success. Here the antecedent of the internalist thesis is not satisfied in cases of radical deception. One challenge here is that there are many ways to be deceived. For example, when someone sees that a lemon is yellow, they might well lack a conscious counterpart who hallucinates, but they arguably still have a conscious counterpart who sees a fake lemon that is yellow. If the subject in a case of vision and the subject in a case of illusion are equally justified, that will be trouble for approaches that give justifying privilege to the states of seeing that \(a\) is \(F\) or seeing \(a\)’s \(F\)ness.