 There are a variety of technical objections to modal fictionalism, and if these objections succeeded they would derail specific proposals like that of Rosen 1990 and perhaps cause difficulties for modal fictionalism in general. The most discussed of these objections is the Brock/Rosen objection, an objection to the theory of Rosen 1990, published independently in Brock 1993 and Rosen 1993. (In the case of Rosen 1993, a variety was also leveled at the fictionalism of Armstrong 1989).