Before revision: (Category Mistakes, Oxford University Press, 2013, page 10, footnote 21) Ryle argued that it was a mistake to treat the mind as an object made of an immaterial substance because predications of substance are not meaningful for a collection of dispositions and URL
After revision: (Category Mistakes, Oxford University Press, 2013, page 10, footnote 21) Ryle argued that it was a mistake to treat the mind as an object made of an immaterial substance because predications of substance are not meaningful for a collection of dispositions and capacities.