However,there exist many paradoxes in the process of verification;among them mainly are time paradox,subjective paradox,and logic paradox.

The paper, through a careful restudy of the transaction cost theory, explores the nature of this theory as well as its logic paradox and expects its further studies will help interpret the economic organizations and phenomena in the real world.

But in common logic accumulate relation is not the law of causation, this induces the logic paradox.

There are various views on the cause of formation of logical paradox in internal and external academic circles, such as the view of fictitious paradox, the view of cognitive mistake, the view of language defect and the view of objective existence and so on.

External academic circles gains many important achievements in the methodology of solving logical paradoxes and some specific methods to analyze logical paradoxes.

Based on a contrast between deontic paradox and moral paradox,argue that moral paradox is not a strictly logical paradox,but a moral quasi-paradox dilemma.

It also provides a critical study on the "logic of paradox"— the formal instrument used by Priest to characterize "true contradictions" and concludes that it fails to this work.

Discussion on Basic Laws of Formal Logic and Semi-paradoxes of Logic;