Full Idea
Role concepts can be of two kinds: they can name whichever property realises the role, or they can name the higher property which constitutes the role.
Gist of Idea
Role concepts either name the realising property, or the higher property constituting the role
Source
David Papineau (Thinking about Consciousness [2002], 4.2 n1)
Book Reference
Papineau,David: 'Thinking about Consciousness' [OUP 2004], p.98
A Reaction
This points strikes me as being crucial to discussions of mental functions. Perhaps labels of Realising Properties and Constituting Properties would help. Analytical philosophy rules.