  Ryle argued that these ideas should be applied much more widely than Russell’s discussion of the paradoxes suggested. The thought was that by recognizing some philosophically puzzling assertions as category mistakes, one would expose them as meaningless, thus dissolving these puzzles altogether. This philosophical methodology saw its culmination in The Concept of Mind, in which Ryle declared that the dualistic position and the mind-body problem that it gives rise to is “one big mistake and a mistake of a special kind. It  is, namely, a category  mistake”.[3]  The exact relation between these philosophical problems and more paradigmatic cases of category mistakes (sentences such as ‘Saturday is in bed’ which Ryle discussed in his earlier work) is not entirely clear, but even putting Ryle’s own application of the concept aside, his work on category mistakes generated a lasting philosophical interest in the phenomenon.