Suitable for students and scholars, this title challenges the assumption that skepticism, rather than established belief, lies at the heart of scientific discovery.

It is a sobering experience to be giving my first Sir Samuel Hall Oration in the line of succession of Samuel Alexander. Some of his Sir Samuel Hall Orations have been published in his book on Beauty and the Other Forms of Value and the Philosophical and Literary Pieces, and they must indeed have been a joy to his audiences. I think it is fitting that I should devote this first lecture to Samuel Alexander, taking one of the central ideas (...) of his philosophy and considering it. If some of what I have to say is critical, I think he would have thought that was all in order. “Pitch into me,” he used to say. After all, the best tribute one can pay to a philosopher is to try to go on with one's own thinking helped by the stimulus of his ideas, and often not least helped by finding oneself impelled to criticize them. (shrink)

I propose to consider the question, "Can machines think?" This should begin with definitions of the meaning of the terms "machine" and "think." The definitions might be framed so as to reflect so far as possible the normal use of the words, but this attitude is dangerous, If the meaning of the words "machine" and "think" are to be found by examining how they are commonly used it is difficult to escape the conclusion that the meaning and the answer to (...) the question, "Can machines think?" is to be sought in a statistical survey such as a Gallup poll. But this is absurd. Instead of attempting such a definition I shall replace the question by another, which is closely related to it and is expressed in relatively unambiguous words. The new form of the problem can be described in terms of a game which we call the 'imitation game." It is played with three people, a man (A), a woman (B), and an interrogator (C) who may be of either sex. The interrogator stays in a room apart front the other two. The object of the game for the interrogator is to determine which of the other two is the man and which is the woman. He knows them by labels X and Y, and at the end of the game he says either "X is A and Y is B" or "X is B and Y is A." The interrogator is allowed to put questions to A and B. We now ask the question, "What will happen when a machine takes the part of A in this game?" Will the interrogator decide wrongly as often when the game is played like this as he does when the game is played between a man and a woman? These questions replace our original, "Can machines think?". (shrink)

Presenting a look at the human mind's capacity while criticizing artificial intelligence, the author makes suggestions about classical and quantum physics and ..

Michael Polanyi was one of the great figures of European intellectual life in the 20th century. A highly acclaimed physical chemist in the first period of his career who became a celebrated philosopher after World War II, Polanyi taught in Germany, England, and the United States and associated with many of the leading intellects of his time. His biography has remained unwritten partly because his many and scattered interests in a wide variety of fields, including six subfields of physical chemistry, (...) epistemology, economics, patent law, social and political theory, aesthetics, and theology. This long-awaited volume will be the definitive resource on Polanyi and his work. (shrink)

We consider two formalisations of the notion of a compositionalsemantics for a language, and find some equivalent statements in termsof substitutions. We prove a theorem stating necessary and sufficientconditions for the existence of a canonical compositional semanticsextending a given partial semantics, after discussing what features onewould want such an extension to have. The theorem involves someassumptions about semantical categories in the spirit of Husserl andTarski.

We consider two formalisations of the notion of a compositionalsemantics for a language, and find some equivalent statements in termsof substitutions. We prove a theorem stating necessary and sufficientconditions for the existence of a canonical compositional semanticsextending a given partial semantics, after discussing what features onewould want such an extension to have. The theorem involves someassumptions about semantical categories in the spirit of Husserl andTarski.

Scientific and political developments of the early twentieth century led Michael Polanyi to study the role of the scientist in research and the interaction between the individual scholar and the surrounding conditions in community and society. In his concept of “personal knowledge” he gave the theory and history of science an anthropological turn. In many instances of the history of sciences, research is driven by a commitment to beliefs and values. Society plays the role of authority and communicative backdrop that (...) presupposes individual liberty. As a system of beliefs science is rooted in community and also in history. However, as soon as fellow humans become the objects of research, their appeal transcends the researcher. Consequently, the history of human endeavor reveals a “firmament” of standards and obligations which represent an ontological reality, for which Polanyi invokes Teilhard de Chardin’s notion of noosphere. (shrink)