The Is-Ought Problem Daniel W 1878-1920 / TRENNERT

1878-1920 / TRENNERT

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The Is-Ought Problem Daniel W 1878-1920 / TRENNERTCan OUGHT be derived from IS? This book presents an investigation of this time honored problem by means of alethic deontic predicate logic. New in this study is the leitmotif of relevance: is ought inferences indeed exist, but they are all irrelevant in a precise logical sense. New proof techniques establish this result for very broad classes of logics. A profound philosophical analysis of is ought bridge principles supplements the logical study. The