R.I.G Hughes offers the first detailed and accessible analysis of the Hilbert-space models used in quantum theory and explains why they are so successful.

During the second half of the XX century drug addiction ceased to be only the epiphenomenon of crime, prostitution and a number of other social-relations deviation, and became a constant value of post-industrial society and at the end of XX century turned into a global problem of mankind. A new form of mass neurosis shows that drug dependence is nowadays socially conditioned mental degeneration, caused by activation of unconscious collective archetypes that are experienced depending on the corresponding situation. The identification (...) of the sacred plant soma/haoma with the marihuana enables us to not only to make clear the light and the dark sides of this archetype, but also to figure out that the reduction of the drug addiction problem, to the acceptable for the society level, is possible only if a man will be able to satisfy his “life-asserting, vital needs”, if he will be able to regain the true meaning of life. (shrink)

In my target article, I argued (1) that the relationship between neocortical size and group size in primates implies that there is a cognitive limit on the size of human groups, and (2) that time constraints forced the evolution of language as a more efficient means of bonding the large groups that humans evolved. The doubts about these claims raised by these additional commentaries largely reflect misinterpretation of my original claims.

Uninformed learning mechanisms will not discover “type- 2” regularities in their inputs, except fortuitously. Clark & Thornton argue that error back-propagation only learns the classical parity problem – which is “always pure type-2” – because of restrictive assumptions implicit in the learning algorithm and network employed. Empirical analysis showing that back-propagation fails to generalise on the parity problem is cited to support their position. The reason for failure, however, is that generalisation is simply not a relevant issue. Nothing can be (...) gleaned about back-propagation in particular, or learning in general, from this failure. (shrink)

The Oxford text of this passage reads as follows:This gives the received text and punctuation. No generally agreed meaning has been found in the opening sentence as it thus stands; nor have any of the numerous alternative versions which have been proposed gained widespread support. In this paper I suggest that good sense can, after all, be made of this passage in its received form.

There has been a revival of interest in Hegel of late among English-speaking philosophers. Although he is still regarded as maddeningly obscure, a number of important philosophers have been attracted by a doctrine prominently associated with Hegel, the coherence theory of truth. In order to hold the coherence theory of truth, it is obvious that you must hold what might be called the coherence theory of truth-testing as well: for if this theory is wrong and we can test some statements (...) by, for example, introspection as well as in terms of coherence, truth must involve something more than just coherence. My arguments against the coherence theory of truth-testing, since it is implied by the coherence theory proper, are indirectly against the coherence theory as well. I also argue that unless some version of the Private Language Argument is successful, it is virtually impossible to defend the coherence theory of truth-testing without denying the existence of experiences, thereby committing oneself to materialism. (shrink)

Molinism attempts to resolve the incompatibility of divine foreknowledge and human libertarian freedom by the inclusion of the divine will into the solution. Moreover, middle knowledge is providentially useful under the Molinist model because of the way God uses it. This speaks of an integral link between the divine will and intellect that works in such a way as to provide a foreknowledge solution and, allegedly, the best view of providence. Nevertheless, there have been several anti-Molinist arguments by analogy which (...) suggest that the God presented in the Molinist model is a manipulator, and therefore something is lost or undermined in the libertarian freedom that Molinism purports to uphold through its model of foreknowledge and providence. This thesis examines the anti-Molinist charge of manipulation primarily by analysing how God uses information known through middle knowledge. The findings of the anti-Molinist arguments from analogy are reconstructed to form deductive arguments. These are evaluated against standard definitions of objectionable manipulation. It is concluded through analysis of these stronger, deductive arguments that divine providence under the Molinist model is a case of objectionable manipulation, one which many theists, classical or progressive, should find abhorrent. The effects of manipulation on ostensible libertarian freedom are then analysed, leading to the conclusion that Molinist-style manipulation results in a form of free-will compatibilism, ergo, the divine foreknowledge problem is not answered, nor is the result compatible with libertarian freedom. Given that it is close to a form of divine determinism, Molinism is then compared with Calvinism along several lines of criticism, namely whether such a God is good, loving and personal. (shrink)

John Searle attempts to show through a consideration of promising that at least some ‘ought’ statements can be derived from ‘is’ statements. He thinks that you can determine on purely factual grounds that a person has made a promise, and that it follows logically from the statement that a person has made a promise that he has at least a prima facie obligation to do the thing he promised to do. I agree with but not with.

Clark & Thornton take issue with my claim that parity is not a generalisation problem, and that nothing can be inferred about back-propagation in particular, or learning in general, from failures of parity generalisation. They advance arguments to support their contention that generalisation is a relevant issue. In this continuing commentary, I examine generalisation more closely in order to refute these arguments. Different learning algorithms will have different patterns of failure: back-propagation has no special status in this respect. This is (...) not to deny that a particular algorithm might fortuitously happen to produce the “intended” function in an parity-generalisation task. (shrink)

Universal human values-this is one of the most frequently encountered phrases today; we are constantly coming across it on the pages of newspapers and magazines. Its frequency creates the illusion that its content is intuitively clear, attractive, and shared by everyone. However, the various versions of what is understood by universal human values-the good, truth, beauty, freedom, or civil society, a non-nuclear world, ecological protection, pluralism, etc.-show that this is by no means the case.

While the evidence that cetaceans exhibit behaviours that are every bit as cultural as those recognised in chimpanzees is unequivocal, I argue that it is unlikely that either taxon has the social cognitive mechanisms required to underpin the more advanced forms of culture characteristic of humans (namely those that depend on shared meaning).

R.I.G. Hughes presents a series of eight philosophical essays on the theoretical practices of physics. The first two essays examine these practices as they appear in physicists' treatises (e.g. Newton's Principia and Opticks ) and journal articles (by Einstein, Bohm and Pines, Aharonov and Bohm). By treating these publications as texts, Hughes casts the philosopher of science in the role of critic. This premise guides the following 6 essays which deal with various concerns of philosophy of physics such as laws, (...) disunities, models and representation, computer simulation, explanation, and the discourse of physics. (shrink)

Contributed articles on literary theory.