Reasoning with conditional sentences

The nature of the truth function when reasoning with conditional sentences was investigated through an analysis of the evaluations of the truth of four deductive arguments by 56 naïve adult Ss. This analysis suggested that only 44.7% of these Ss consistently assessed the validity of these arguments in a truth-functional manner. Of these Ss, the majority appeared to utilize a truth function which was the same as that for a biconditional in...