1. 1. Peter Kivy, “Differences,” The Journal of Aesthetics and Art Criticism 51, no. 2 (1993): 131.
2. 2. Peter Kivy, Philosophies of Arts: An Essay in Differences (Cambridge: Cambridge University Press, 1997), 53.
3. 3. Note that I use “arts” and “artforms” interchangeably throughout the article.
4. 4. For evidence that “unique” has been used with modifiers (“in the comparative and superlative”) since the eighteenth century, see “unique, adj. and n.” OED Online, July 2018, www.oed.com/view/Entry/214712 (accessed Sept. 25, 2018).
5. 5. If comics are literature, there are still the other three cases.