 The primary worry for necessitarians concerns their ability to sustain their dismissals of the traditional reasons for thinking that some laws are contingent. The problem (cf., Sidelle 2002, 311) is that they too make distinctions between necessary truths and contingent ones, and even seem to rely on considerations of conceivability to do so. Prima facie, there is nothing especially suspicious about the judgment that it is possible that an object travel faster than light. How is it any worse than the judgment that it is possible that it is raining in Paris? Another issue for necessitarians is whether their essentialism regarding dispositions can sustain all the counterfactuals that are apparently supported by laws of nature (Lange 2004).