这就是说，对同一对象，有两个相反的命题，甚至这两个相反的命题中的每一个都具有同样的必然性。

In other words it maintains two opposite propositions about the same object, and in such a way that each of them has to be maintained with equal necessity.

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通常的问题是如何把它们散发出去，可匹斯堡大学约翰斯顿校区的设计者们，则提出了一个相反的命题—如何收集体热。

The usual problem is how to dispose of it. But the designers of the Johnstown campus of the University of Pittsburgh set themselves the opposite problem—how to collect body heat.

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