Of counterfeits and delusions: Revisiting Ryle on skepticism and the impossibility of global deceit

Consider the following proposition: (Q) It is possible that all of our perceptual experiences are ‘delusive.’ According to Gilbert Ryle, (Q) is demonstrably absurd. In this paper I address four questions: (1) What is Ryle’s argument against (Q)?; (2) How persuasive is it?; (3) What positions are ruled out if (Q) is absurd?; and (4) How does Ryle’s position compare with contemporary work on skepticism?