This classic remains 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.

What psychological and philosophical significance should we attach to recent efforts at computer simulations of human cognitive capacities? In answering this question, I find it useful to distinguish what I will call "strong" AI from "weak" or "cautious" AI. According to weak AI, the principal value of the computer in the study of the mind is that it gives us a very powerful tool. For example, it enables us to formulate and test hypotheses in a more rigorous and precise fashion. (...) But according to strong AI, the computer is not merely a tool in the study of the mind; rather, the appropriately programmed computer really is a mind, in the sense that computers given the right programs can be literally said to. (shrink)

This article assesses what standards of safety and certainty of diagnosis need to be met in the determination of brain death. Recent medical, legal, and philosophical developments on brain death are summarized. It is argued that epistemologically adequate standards require the finding of whole-brain death rather than destruction of the cortex. Because of the possibility of positive error in misdiagnosing death, a tutioristic approach of being on the safe side is advocated. Given uncertainties in diagnosis of so-called vegetative states like (...) the apallic syndrome, anything less than whole-brain death, especially given the present state of diagnostic capability, should not qualify as an argument for removing therapy specifically on grounds that the patient is dead. (shrink)

Contrary to received opinion among philosophers, psychologists, and neuroscientists, conscious duality as a principle of brain organization is neither incoherent nor demonstrably false. The present paper begins by reviewing the history of the theory and its anatomical basis and defending it against the claim that it rests upon an arbitrary decision as to what constitutes the biological substratum of mind or person.

Supposons qu'il soit possible de transplanter les centres de Ia douleur de Jones dans le cerveau de Smith. A mi-chemin pendant!'operation, on teste ces centres de Ia douleur en les stimulant électriquement in vitro. Y aurait-il de Ia douleur? L'argument de cet article est qu'il n'y en aurait pas, parce que Ia douleur doit avoir un possesseur. Sinon, il ne peut arriver que les centres de Ia douleur se déchargeant dans un cerveau soient en eux-mêmes Ia douleur. On peut logiquement (...) transférer le mécanisms de Ia douleur, mais non Ia douleur elle-mêmes. Ainsi le materialisme est faux.Suppose we live in a very advanced age of neurosurgical skills. We have a patient, Jones, with intractable pain. We have a second patient, Smith, with a long history of unintentional self-injury due to congenital absence of pain centres. So we decide to do double service by transplanting Jones's pain centres into Smith's brain. (shrink)

Supposons qu'il soit possible de transplanter les centres de Ia douleur de Jones dans le cerveau de Smith. A mi-chemin pendant!'operation, on teste ces centres de Ia douleur en les stimulant électriquement in vitro. Y aurait-il de Ia douleur? L'argument de cet article est qu'il n'y en aurait pas, parce que Ia douleur doit avoir un possesseur. Sinon, il ne peut arriver que les centres de Ia douleur se déchargeant dans un cerveau soient en eux-mêmes Ia douleur. On peut logiquement (...) transférer le mécanisms de Ia douleur, mais non Ia douleur elle-mêmes. Ainsi le materialisme est faux.Suppose we live in a very advanced age of neurosurgical skills. We have a patient, Jones, with intractable pain. We have a second patient, Smith, with a long history of unintentional self-injury due to congenital absence of pain centres. So we decide to do double service by transplanting Jones's pain centres into Smith's brain. (shrink)

1 Matching Templates and Feature Analysers. 2 Modes of Perception in Left and Right Cerebral Hemispheres. 3 Identification and Recognition. 4 Chess Plying Machines.

There has been considerable optimism recently, among philosophers and neuroscientists, concerning the prospect for major discoveries about the neurophysiological basis of mind. The support for this optimism has been extremely abstract and general. I wish to present some grounds ..