 Other unthinkable sorites arguments use predicates that can only be grasped by individuals in other possible worlds or by creatures with different types of minds than ours. More fancifully, there could be a vague predicate, such as Saul Kripke’s “killer yellow”, that instantly kills anyone who wields it. The basic problem is that contextualism is a psychologistic theory of the sorites. Since arguments can exist without being propounded, they float free of attempts to moor them to arguers.