Sidgwick thought that utilitarianism and egoism were rationally required, and left the dilemma of dualism of practical reason.
西季威克认为功利主义与利己主义是同样合理的，留下了实践理性二重性的难题。
After all, Sidgwick left the dualism of practical reason for us. He failed to put utilitarianism and egoism together, although he succeeded in unifying intuitionism and utilitarianism.
西季威克调和了直觉主义和功利主义，却无法调和功利主义和利己主义，留下了著名的实践理性二元论。
Researching Sidgwick's development of classical utilitarianism, we could get more background of dualism of practical reason. It seems could help us find a new way to think this problem.
深入研究西季威克对古典功利主义的发展，有助于我们更好地理解实践理性二元论产生的背景，以期能从新的角度对这一问题做出思考。
The key for us to resolve dualism of practical reason is to construct the just social system and harmonize individual interest and universal interest, but not to illustrate that egoism is fully wrong.
文章认为，解决实践理性二重性的关键不是要证明利己主义是完全错误的，而是要创建正义的社会制度、辩证地处理好个人利益与普遍利益的关系。
The key for us to resolve dualism of practical reason is to construct the just social system and harmonize individual interest and universal interest, but not to illustrate that egoism is fully wrong.
文章认为，解决实践理性二重性的关键不是要证明利己主义是完全错误的，而是要创建正义的社会制度、辩证地处理好个人利益与普遍利益的关系。
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