The way in which knowledge progresses, and especially our scientific knowledge, is by unjustified anticipations, by guesses, by tentative solutions to our problems, by conjectures. These conjectures are controlled by criticism: that is, by attempted refutations, which include severely critical tests. They may survive these tests; but they can never be positively justified: they can neither be established as certainly true nor even as 'probable'. Criticism of our conjectures is of decisive importance: by bringing out our mistakes it makes us (...) understand the difficulties of the problems which we try to solve. This is how we become better acquainted with our problem, and able to propose more mature solutions: the very refutation of a theory - that is, of a tentative solution to our problem - is always a step forward that takes us nearer the truth. And this is how we can learn from our mistakes. As we learn from our mistakes our knowledge grows, even though we may never know - that is, know for certain. Since our knowledge can grow, there can be no reason here for despair of reason. And since we can never know for certain, the can be no authority here for any claim to authority, for conceit over our knowledge, or for smugness. The essays and lectures of which this book is composed apply this thesis to many topics, ranging from problems of the philosophy and history of the physical and social sciences to historical and political problems. (shrink)

_Conjectures and Refutations_ is one of Karl Popper's most wide-ranging and popular works, notable not only for its acute insight into the way scientific knowledge grows, but also for applying those insights to politics and to history. It provides one of the clearest and most accessible statements of the fundamental idea that guided his work: not only our knowledge, but our aims and our standards, grow through an unending process of trial and error.

_Conjectures and Refutations_ is one of Karl Popper's most wide-ranging and popular works, notable not only for its acute insight into the way scientific knowledge grows, but also for applying those insights to politics and to history. It provides one of the clearest and most accessible statements of the fundamental idea that guided his work: not only our knowledge, but our aims and our standards, grow through an unending process of trial and error.

In this paper it is suggested that Freud's 'tally argument' (Grunbaum 1984) is not best interpreted as a risky claim concerning the efficacy of psychoanalytic therapy, but as a risky claim concerning the implications of theoretical psychoanalytic explanations of the efficacy of psychoanalytic therapy. Despite the fact that Freud never empirically established that these implications hold, the 'tally argument' does draw attention to a critical distinction that is too often neglected in contemporary empirical studies of psychoanalysis and other forms of (...) psychotherapy: between empirical evaluations of the efficacy of psychotherapy and empirical evaluations of theoretical explanations of the efficacy of psychotherapy, and the different forms of comparative enquiry relevant to each. It is argued that the contemporary neglect of this critical distinction, in conjunction with the common negative conception of placebo control treatments in psychotherapy research, has led to the epistemic impoverishment of experimental studies of the various professional psychotherapies. In consequence, although there is good empirical evidence for the efficacy of psychoanalysis and other forms of professional psychotherapy, there is no good empirical evidence for theoretical psychoanalytic explanations of the efficacy of psychoanalysis, or for traditional theoretical explanations of the efficacy of other forms of professional psychotherapy. (shrink)

Human beings have the unique ability to view the world in a detached way: We can think about the world in terms that transcend our own experience or interest, and consider the world from a vantage point that is, in Nagel's words, "nowhere in particular". At the same time, each of us is a particular person in a particular place, each with his own "personal" view of the world, a view that we can recognize as just one aspect of the (...) whole. How do we reconcile these two standpoints--intellectually, morally, and practically? To what extent are they irreconcilable and to what extent can they be integrated? Thomas Nagel's ambitious and lively book tackles this fundamental issue, arguing that our divided nature is the root of a whole range of philosophical problems, touching, as it does, every aspect of human life. He deals with its manifestations in such fields of philosophy as: the mind-body problem, personal identity, knowledge and skepticism, thought and reality, free will, ethics, the relation between moral and other values, the meaning of life, and death. Excessive objectification has been a malady of recent analytic philosophy, claims Nagel, it has led to implausible forms of reductionism in the philosophy of mind and elsewhere. The solution is not to inhibit the objectifying impulse, but to insist that it learn to live alongside the internal perspectives that cannot be either discarded or objectified. Reconciliation between the two standpoints, in the end, is not always possible. (shrink)

This study is a philosophical critique of the foundations of Sigmund Freud's psychoanalysis. As such, it also takes cognizance of his claim that psychoanalysis has the credentials of a natural science. It shows that the reasoning on which Freud rested the major hypotheses of his edifice was fundamentally flawed, even if the probity of the clinical observations he adduced were not in question. Moreover, far from deserving to be taken at face value, clinical data from the psychoanalytic treatment setting are (...) themselves epistemically quite suspect. (shrink)

As Aristotle stated, scientific explanation is based on deductive argument--yet, Wesley C. Salmon points out, not all deductive arguments are qualified explanations. The validity of the explanation must itself be examined. _Four Decades of Scientific Explanation_ provides a comprehensive account of the developments in scientific explanation that transpired in the last four decades of the twentieth century. It continues to stand as the most comprehensive treatment of the writings on the subject during these years. Building on the historic 1948 essay (...) by Carl G. Hempel and Paul Oppenheim, "Studies in the Logic of Explanation,” which introduced the deductive-nomological model on which most work on scientific explanation was based for the following four decades, Salmon goes beyond this model's inherent basis of describing empirical knowledge to tells us “not only _what,_ but also _why_.” Salmon examines the predominant models in chronological order and describes their development, refinement, and criticism or rejection. _Four Decades of Scientific Explanation_ underscores the need for a consensus of approach and ongoing evaluations of methodology in scientific explanation, with the goal of providing a better understanding of natural phenomena. (shrink)

This study is a philosophical critique of the foundations of Sigmund Freud's psychoanalysis. As such, it also takes cognizance of his claim that psychoanalysis has the credentials of a natural science. It shows that the reasoning on which Freud rested the major hypotheses of his edifice was fundamentally flawed, even if the probity of the clinical observations he adduced were not in question. Moreover, far from deserving to be taken at face value, clinical data from the psychoanalytic treatment setting are (...) themselves epistemically quite suspect. (shrink)

Though Freud never makes utopia the subject of any one work, this book is an attempt to tease out Freud's notion of utopia through examination of his group-psychology works such as The Future of an Illusion, Civilization and Its Discontents, Why War? and On the Question of a Weltanschauung. Through tracing out three key blows to human narcissism through scientific advance, it shows the extent to which biological factors impact human psychology and influence the prospect of future human happiness—the triumph (...) of ego over id. (shrink)

All of Freud's more recent writings extol the virtues of the scientific method. “The Future of an Illusion” ends with the definite suggestion that religious instruction be taken from the list of topics taught every child and that in its place children be taught to interpret reality in terms of natural science. A similar theme runs through “Civilization and its Discontents”; if there be any hope for humanity, it lies in the scientific method. Finally, Freud's “New Introductory Lectures” ends with (...) the following lines—lines which must be very reassuring to many admirers of Freud who have been somewhat discomfited by some of the recent highly speculative passages from his pen. (shrink)