Abstract
In this paper I want to return to some well-worn ideas; specifically, the attempt to show that there is a distinctive subject-matter of the aesthetic via consideration of the difference between aesthetic and non-aesthetic concepts. The classic exposition of this distinction is Frank Sibley's 'Aesthetic Concepts'. Sibley claimed that, given a set of relevant terms, there will be widespread non-collusive agreement as to which are aesthetic and which non-aesthetic. Non-aesthetic terms include _'red, noisy, brackish, clammy, square, docile, curved, evanescent, intelligent, faithful, derelict, tardy, freakish'_. Aesthetic terms include _'unified, lifeless, serene, sombre, dynamic, powerful, vivid, delicate, moving, trite, sentimental, tragic'_. Further examples have been given by other philosophers working in the field. Given the widespread agreement, I shall assume there is a distinction of some sort whose nature is open to be discussed