Full Idea
Eight properties of mind are problems for the identity theory: rationality, free will, spatiality, privacy, intentionality, essential mentality, subjective content, and the explanatory gap.
Gist of Idea
Can identity explain reason, free will, non-extension, intentionality, subjectivity, experience?
Source
Georges Rey (Contemporary Philosophy of Mind [1997], 2.7)
Book Reference
Rey,Georges: 'Contemporary Philosophy of Mind' [Blackwell 1997], p.64
A Reaction
The list could go on: poetry, creativity, love, normativity... Actually, these are problems for every theory.