Feng qi claims that any concept has a dual function of describing and prescribing reality , and that those basic logical rules embody a unity of a posteriority and a priority 摘要冯契认为，一切概念都有摹写现实与规范现实的双重作用，逻辑原则也体现着后验性与先验性的统一。
2.
The wastewater treatment system is one dynamic system of indeterminacy , time - variance , nonlinearity and posteriority . so it is difficult to create a precise mathematical model 城镇污水处理系统是一个具有不确定性、时变性、非线性、滞后性的动态系统,难于建立起精确的数学模型。
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Considering the problem of the justification of logical theory , feng ' s such a theory requires that the construction of a logical theory adhere to the unity of a posteriority and a priority 在逻辑理论的证成问题上， “概念的双重作用”要求逻辑理论的建构必须坚持后验性与先验性的统一。
4.
The justification of the argument theory in modern logic takes a more universalistic and a prior approach ; however , informal logic tries to justify itself from the perspective of a unity of a posteriority and a priority , and of universality and contextuality 有见于现代逻辑论证理论的普遍主义、先验主义倾向，非形式逻辑试图从后验性与先验性、普遍性与情境性的统一中去证成自身。
5.
Nevertheless , a system , no matter how good it is , should always have its posteriority . the responsibility claiming system , no matter how strict it is , could only bring about the standardized public service at the very most , but it could not 然而,再好的制度也有它的滞后性,再严密的责任追究,最多也只不过获得标准化的公共服务,不一定能获得具有优良品质的公共服务,因此,行政人的道德自律和内心信念的建立才是实现公共责任之道。
