A separate proposal for a genuine fourth relationship is Ruth Chang’s argument for “on a par” (Chang 1997; Chang 2002b). Two items are said to be on a par if neither is better than the other, their differences preclude their being equally good, and yet they are comparable. Whereas “roughly equal” is invoked to allow for comparability among alternatives that display the same respects (e.g., literary merit), “on a par” is invoked to allow for comparability between alternatives that are different i