| Summary: | An argument from illusion assumes that the illusion occurring in perception is a reason to redefine the ordinary account of perception as a direct and immediate access to reality, therefore it suffice to refute a direct realism. Many theories of perception where arisen to address the problem, the most popular ones are: the sense-datum theory, the adverbial theory, the intentionalist theory and the mostrecent the disjunctivist theory. Recent work in psychology and philosophy of mind on change blindness and related phenomena elicit a new skepticism about the nature of perception which is called a grand illusion hypothesis. It seems that doubts engendered by this hypothesis goes even further than those of the argument from illusion, because it suggests that subjects have a radically false beliefs about what their perceptual experience is like. I’d like to consider the number of ways of understanding the hypothesis and evaluate them.
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