Popper: I do admit that at any moment we are prisoners caught in the framework of our theories; our expectations; our past experiences; our language. But we are prisoners in a Pickwickian sense: if we try, we can break out of our framework at any time. Admittedly, we shall find ourselves again in a framework, but it will be a better and roomier one; and we can at any moment break out of it again.Kuhn: If that possibility were routinely available, (...) there ought to be no very special difficulties about stepping into someone else's framework in order to evaluate it. My critics' attempts to step into mine suggest, however, that changes of framework, of theory, of language, or of paradigm pose deeper problems of both .. (shrink)