Comparing one state’s criminal doctrines to those of otherstates is difficult, as the hypothetical outcome depends on interdependent rules. For example, states grade homicides differently (some states define three degrees of murder’ and others define only one®), they require different "See e.g. Fla. Stat. Ann. § 782.04; 18 Pa.C.S.A. § 2502. *See e.g. Ala. Code §13A-6-2; 17-a Maine Rev. Stat Ann. § 201. 50 mental states for murder (some require a purposeto kill? whereas others permit murder convictions based on gross negligence),’° they define imperfect self-defense differently(if at all),"’ and they prescribe varying degrees of exculpation for intoxication (if at all).'* Furthermore, not every state has determined the application of these interdependentdoctrines.