| The research content of this paper mainly focuses on the semantics and logic of conditional sentences in propositional calculus,there are few researches on the criteria for the validity of propositional calculus and the arguments involving conditional sentences,therefore,this will be an important reference for my research.Premise semantics plays an important role in linguistics,probability theory plays an important role in philosophers’ knowledge and scientific interpretation thinking。It is an important research object in logic.It has been discussed since the last century.The interpretation of semantics is the primary topic,in which probability theory,as the representative theory of interpretation,has received extensive attention and support.Counterfactual conditionals are not only sought after by the academic circles,but also criticized and refuted by all parties.Kaufman has made important progress in how to deal with these problems,but it is still an unsolved problem in conditional probability analysis.Lewis,Adams and others have made satisfactory responses to these problems by using a variety of methods,such as language analysis,logical analysis and so on.They can also be used for causality analysis,and conditional probability analysis is bound to resort to this kind of analysis.Although they are based on similar assumptions,they provide a valuable alternative to conditional probability analysis.The starting point of this paper is to discuss semantics and insertion probability in detail,and to make a new interpretation of this theory from the aspects of the event itself,its environment and the principle of rationalization,so as to demonstrate the rationality of this theory. |
