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Grounding Normative Assertions: Arthur Leff's Still Irrefutable, But Incomplete, "Sez Who?" Critique, Samuel W. Calhoun

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The late Professor Arthur Leff believed that standard methods for grounding normative assertions fail to provide a solid foundation for moral judgment because none provides a satisfactory answer to what Leff called the grand 'sez who?' - a universal taunt by which a skeptic may challenge the standing/competency of the speaker to make authoritative moral assessments. Leff argued that as a matter of logic no system of morals premised in mankind alone ever could withstand the taunt. His provocative conclusion was that the only unchallengeable response to the grand 'sez who?' is God sez.

This Article demonstrates the continued relevance …