Hume's skepticism is not only the end of rationalism

but also the end of empiricism. In" A Treatise of Human Nature"

Hume argument the theory of causality through three prerequisites and a principle

illustrating the nature of the problem of induction.The problem of induction challenges the legitimacy of inductive reasoning

and later philosophers have discussed it

among which Carnap's probabilistic logic scheme has attracted much attention. Carnap studys inductive process through deductive method and introduces the concept of the degree of confirmation.By demonstration

Carnap converted the problem of determining the probability P logically into the probability of determining the description of the state

and the induction problem was solved.However

using the method of deductive inference to study inductive logic is not desirable.