 Minimality  also implies that the negation of a perfectly natural property is never perfectly natural. This does not so obviously raise worries about arbitrariness. Nevertheless, the relation between a relation and its negation is structurally quite similar to the relation between a relation and its converse—both seem to involve a kind of “interdefinability”—so there are some attractions to saying that the negation of a perfectly natural property is always perfectly natural, and more generally that the negation of any property is equal to it in naturalness. This has been suggested by Plate  (2016)  and Dorr  (2016).[33] 