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Emst Mally ,an Austrian logican,who presented the first system of deontic logic in 1926,and has contributed a lot to development of deontic logic. 恩斯特·馬利(Ernst Mally),奧地利著名邏輯學家,於1926年提出了第一個道義邏輯系統,開辟了邏輯研究的新領域。