 The cause-law principle states that events related as cause and effect are covered by strict laws. In the earliest formulations of Anomalous Monism, Davidson assumed but did not argue for this principle. His later argument in support of it will be considered below  (3.2),  along with objections to the principle  (3.3).  But we need to consider the nature of the requirement contained in this claim, and how it relates to the framework out of which Anomalous Monism is deduced.