Book 1, Chapter 3, Footnote #06
Bain on ``atributes''
Professor Bain (Logic, i. 49) defines attributes as ``points of community among classes''. This definition expresses well one point of view, but is liable to the objection that it applies only to the attributes of classes; though an object, unique in its kind, may be said to have attributes. Moreover, the definition is not ultimate, since the points of community themselves admit of, and require, further analysis; and Mr. Bain does analyse them into resemblance in the sensations, or other states of consciousness excited by the object.