Corroboration and Probability

In The Logic of Scientific Discovery, K. R. Popper says that he has A. provided “a mathematical refutation of all those theories of induction which identify the degree to which a statement is supported or confirmed or corroborated by empirical tests with its degree of probability in the sense of the calculus of probability.” He tells us that “those who identify, explicitly or implicitly, degree of corroboration, or of confirmation, or of acceptability, with probability [are] Keynes, Jeffreys, Reichenbach, Kaila, Hosiasson, and, more recently, Carnap.”