Lehmann V
Z Geburtshilfe Perinatol. 1983 Mar-Apr;187(2):55-64.
The obstetric chair--a useful piece of furniture or just a fashionable revival? This formulation could be conceived of as two hypotheses in the question form. Both need investigation and, if necessary, verification. If one hypothesis is accepted to be the truth, it can be used to refute the other. If, on the one hand, the obstetric chair is merely a historical piece of furniture which is experiencing a fashionable revival, it is of no practical importance today. If, on the other hand, it is also of obvious use nowadays, it is not only a historical piece of furniture.
产科椅——一件有用的家具还是仅仅是一种时尚的复兴？这种表述可以被设想为两个疑问句形式的假设。两者都需要研究，如有必要还需验证。如果一个假设被认为是正确的，它就可以用来反驳另一个假设。一方面，如果产科椅仅仅是一件正在经历时尚复兴的历史家具，那么它在今天就没有实际重要性。另一方面，如果它如今也有明显用途，那它就不仅仅是一件历史家具。
