A non-monotonic extension of universal moral grammar theory

Abstract

We extend universal moral grammar (UMGT) with non-monotonic logic. Our experiment shows that such revision is necessary as it allows to account for the effects of alleviations and aggravations in moral reasoning. Our new theory updates UMGT from classical to non-monotonic logic, which reflects the incompleteness of information and uncertainty in actual human reasoning. Moreover, it provides an explanation of the paradoxical findings in the moral dilemma of the Trolley problem and the Knobe effect.


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