Continuing his exploration of the organization of complexity and the science of design, this new edition of Herbert Simon's classic work on artificial ...
It is often claimed that there can be no such thing as a logic of scientific discovery, but only a logic of verification. By 'logic of discovery' is usually meant a normative theory of discovery processes. The claim that such a normative theory is impossible is shown to be incorrect; and two examples are provided of domains where formal processes of varying efficacy for discovering lawfulness can be constructed and compared. The analysis shows how one can treat operationally and formally (...) phenomena that have usually been dismissed with fuzzy labels like 'intuition' and 'creativity'. (shrink)
With the discovery of voluminous discordant empirical evidence, maximizing expected utility is rapidly disappearing as the core of the theory of human rationality, and a theory of bounded rationality, embracing both the processes and products of choice, is replacing it. There remains a large task of organizing our picture of economic and social processes and adding the new facts needed to shape the theory in an empirically sound way. It is also urgent that new tools now available for conducting empirical (...) inquiry and constructing models be incorporated in social science graduate education. (shrink)
It is shown how a causal ordering can be defined in a complete structure, and how it is equivalent to identifying the mechanisms of a system. Several techniques are shown that may be useful in actually accomplishing such identification. Finally, it is shown how this explication of causal ordering can be used to analyse causal counterfactual conditionals. First the counterfactual proposition at issue is articulated through the device of a belief-contravening supposition. Then the causal ordering is used to provide modal (...) categories for the factual propositions, and the logical contradiction in the system is resolved by ordering the factual propositions according to these causal categories. (shrink)
The task of axiomatizing physical theories has attracted, in recent years, some interest among both empirical scientists and logicians. However, the axiomatizations produced by either one of these two groups seldom appear satisfactory to the members of the other. It is the purpose of this paper to develop an approach that will satisfy the criteria of both, hence permit us to construct axiomatizations that will meet simultaneously the standards and needs of logicians and of empirical scientists.
New computer systems of discovery create a research program for logic and philosophy of science. These systems consist of inference rules and control knowledge that guide the discovery process. Their paths of discovery are influenced by the available data and the discovery steps coincide with the justification of results. The discovery process can be described in terms of fundamental concepts of artificial intelligence such as heuristic search, and can also be interpreted in terms of logic. The traditional distinction that places (...) studies of scientific discovery outside the philosophy of science, in psychology, sociology, or history, is no longer valid in view of the existence of computer systems of discovery. It becomes both reasonable and attractive to study the schemes of discovery in the same way as the criteria of justification were studied: empirically as facts, and logically as norms. (shrink)
This essay responds to the helpful criticisms of Valuing Health: Well-Being, Freedom, and Suffering, which have been offered by Elselijn Kingma, Adam Oliver, Anna Alexandrova, Alex Voorhoeve, Erik Nord and James Wilson. I am extremely grateful to Jonathan Wolf and especially James Wilson for arranging a one-day conference on my book, Valuing Health: Well-Being, Freedom, and Suffering [Hausman, D.. Valuing Health: Well-Being, Freedom, and Suffering. Oxford: Oxford University Press.], and for publishing this symposium. I am also grateful to the wonderful (...) six scholars who took the time to study my work and to offer perceptive and helpful criticisms. Without unduly trying the patience of readers, I cannot respond to all their remarks, but I hope that in what follows I have replied to the most important of their comments on the arguments and conclusions of Valuing Health. Before I begin these replies, a brief synopsis of Valuing Health may be helpful to the reader. (shrink)
