The Commens Dictionary
Quote from ‘The Logic of Relatives’
By logical reflexion, I mean the observation of thoughts in their expressions. Aquinas remarked that this sort of reflexion is requisite to furnish us with those ideas which, from lack of contrast, ordinary external experience fails to bring into prominence. He called such ideas second intentions. It is by means of relatives of second intention that the general method of logical representation is to find completion.
‘Second Intention’ (pub. 23.08.15-22:39). Quote in M. Bergman & S. Paavola (Eds.), The Commens Dictionary: Peirce's Terms in His Own Words. New Edition. Retrieved from http://www.commens.org/dictionary/entry/quote-logic-relatives-10.