COMMENT ā VALID 00002 PAGES C REC PAGE DESCRIPTION C00001 00001 C00002 00002 counte[s83,jmc] A cartesian product theory of counterfactuals C00003 ENDMK Cā; counte[s83,jmc] A cartesian product theory of counterfactuals Counterfactual conditional sentences are important in common sense reasoning. We here propose a new theory based on the approximate theories of the some aspect of the world