What is the place of Psychoanalytic Theory on our map of knowledge and belief? Various alternatives are considered. Is it a scientific theory? — a myth? — or like a prescientific example of natural philosophy? — a branch of medical knowledge? — a premature empirical synthesis that is an approximation to the truth? Each of these answers runs into objections and difficulties, some of which are examined or noted. On the assumption that it is a provisional story which approximates to (...) the truth, the question is then raised: what can we do to find out how much of an approximation to the truth the theory really is? The relevance and value of psychological studies are discussed; and the suggestion is made that the status of Psychoanalytic Theory will remain an ambiguous one for some time to come. (shrink)

This paper examines the challenge that psychoanalytic theory cannot be refuted. It does so by considering the theory in its orthodox Freudian form, and in the main branches into which it can be divided ? the theory of Instincts, of Development, of Psychic Structure, of Mental Economics or Defence, and of Symptom Formation. The essential character of the generalizations and concepts of these branches will just be indicated; and we shall ask of each branch whether it is possible to refute (...) it. A considerable amount of scientific enquiry has been done into the concepts and generalizations of psychoanalysis. Relevant examples of these enquiries will be noted; and the question asked whether these scientific studies have in fact done anything to refute or support the various branches of psychoanalytic theory. The general upshot will be that the challenge is both important and a mistake. (shrink)

Despite its explanatory clout, the theory of evolution has thus far compiled a modest record with respect to predictive power—that other major hallmark of scientific theories. This is considered by many to be an acceptable limitation of a theory that deals with events and processes that are intrinsically random. However, whether this is an inherent restriction or simply the sign of an incomplete theory is an open question. In an attempt to help answer that question, we propose a classification scheme (...) for several types of prediction that might occur with regard to evolutionary systems, then explore the nature of these predictions in a system that simulates the evolution of neural architectures. This provides a platform from which to consider the relevance of such observations for real biological systems and illuminates a variety of key issues pertaining to prediction in those environments. (shrink)