本文以〈洪範〉中的第七疇「稽疑」為討論中心，且以經文範例中的「三從二逆」（三贊成、二反對）與「二從三逆」（二贊成、三反對）為主，試圖分析其中卜筮與人謀、卜與筮之間的關係。在卜筮與人謀方面，前人有重人謀說、重卜筮說與調和說；而在卜與筮方面，前人則有卜筮相等說、卜高於筮說與卜筮互補說。本文採取歷史發展演變的觀點，重新審視這兩個議題，由此得知〈洪範〉反映了殷末周初的三種時代特色：第一，卜筮並行而卜高於筮；第二，卜筮與人謀相參而偏重卜筮；第三，人們嘗試以己意控制卜筮結果判讀，由此影響決策方向。

This research focuses on “resolving the doubts,” the seventh part of Hong Fan, and analyzes the relationships between divination and human thinking, as well as oracle bone divination and milfoil divination based on the examples “three agree versus two oppose” and “two agree versus three oppose” in the text. About the relationship between divination and human thinking, there were humanism theory, divine theory, and compromise theory. And about the relationship between oracle bone divination and milfoil divination, there were equal theory, oracle bone first theory, and complementary theory. This paper reanalyzes these topics from a historical perspective, knowing that Hong Fan reflects three characteristics of late Shang to early Zhou period. First, oracle bone divination and milfoil divination were used at the same time, but oracle bone divination was more important than milfoil divination. Second, divination and human thinking executed, but divination was more important than human thinking. Third, people tried to influence the decision making by controlling the interpretation of divination.