D.P. It will technically be possible to get rid of all suffering within a century or two. Its abolition would be practical only if it were agreed in the sense of something like the moon program or the human genome project – if there was a degree of social consensus. There are certainly technological obstacles, but they are dwarfed by the ethical-ideological ones. Many people’s negative reaction to the idea of a world without suffering comes from a fear that someone (...) is going to be manipulating and controlling them. Partly, too, the abolition of suffering seems to make a mockery of one’s life projects. Most of us spend the greater part of our lives seeking happiness for ourself and others we care about. But we do so in extremely inefficient and in many cases self-defeating ways. This is a problem with existing human society. Even though we have made extraordinary progress technologically and medically, we aren’t any happier than our ancestors. Even if we could arrange society in the most utopian way imaginable, there would be some people who would still be depressed and anxious. There would be some people who would be consumed by jealousy or unhappy love affairs. No amount of environmental reform or manipulation is going to get rid of suffering. Only biotechnology can eradicate its neural substrates. (shrink)

The doctrines of scientific realism have enjoyed a close and enduring, if not always harmonious, association with Tarski's semantic conception of truth and theories of formal semantics generally. From its inception Tarski's theory received unqualified support from some realists, like Karl Popper, who saw it as legitimizing the use of semantic notions in epistemology and the philosophy of science.

The paper provides a preliminary study of algebraic semantics for modal and superintuitionistic non-monotonic logics. The main question answered is: how can non-monotonic inference be understood algebraically?

Before anaesthesia, surgery used to be agony. It’s hard to imagine that anyone could have been anything but pleased when painless surgery was introduced in the mid-19th century. And yet, although many welcomed anaesthesia, some did object. In Zurich, anaesthesia was even outlawed. “Pain is a natural and intended curse of the primal sin. Any attempt to do away with it must be wrong,” claimed the Zurich City Fathers. Painless delivery in childbirth was a particularly contentious issue. Some insisted that (...) “in sorrow thou shalt bring forth children” (Genesis 3:16). Others, like Doctor Charles Delucena Meigs (1792-1869), Professor of Obstetrics and Diseases of Women at Jefferson Medical College, believed that labour pains were “a most desirable, salutary and conservative manifestation of the life force.” There was even a belief, expressed in 1847 in The New York Journal of Medicine, that pain was vital to surgical procedure. (shrink)

ANDRÉS LOMEÑA: Transhumanism, or human enhancement, suggests the use of new technologies to improve mental and physical abilities, discarding some aspects as stupidity, suffering and so forth. You have been described as technoutopian by critics who write on “Future hypes”. In my opinion, there is something pretty much worse than optimism: radical technopessimism, managed by Paul Virilio, deceased Baudrillard and other thinkers. Why is there a strong strain between the optimistic and pessimistic overview?

We revive the idea that a deductive-nomological explanation of a scientific theory by its successor may be defensible, even in those common and troublesome cases where the theories concerned are mutually incompatible; and limiting, approximating and counterfactual assumptions may be required in order to define a logical relation between them. Our solution is based on a general characterization of limiting relations between physical theories using the method of nonstandard analysis.

Economists assume that people are fundamentally greedy, though not exclusively so. If environmental improvement is to be achieved, it will require policies that use selfishness rather than opposing it. Such policies are to be found in the basics of green economics in which market signals are modified by environmental taxes and tradeable pollution certificates to 'decouple' the economic growth process from its environmental impact. Green economic policies avoid the infringements of human liberties implied in ever stronger 'command and control' measures.

Certain extensions of Nelson's constructive logic N with strong negation have recently become important in arti.cial intelligence and nonmonotonic reasoning, since they yield a logical foundation for answer set programming (ASP). In this paper we look at some extensions of Nelson's .rst-order logic as a basis for de.ning nonmonotonic inference relations that underlie the answer set programming semantics. The extensions we consider are those based on 2-element, here-and-there Kripke frames. In particular, we prove completeness for .rst-order here-and-there logics, and their (...) minimal strong negation extensions, for both constant and varying domains. We choose the constant domain version, which we denote by QNc5, as a basis for de.ning a .rst-order nonmonotonic extension called equilibrium logic. We establish several metatheoretic properties of QNc5, including Skolem forms and Herbrand theorems and Interpolation, and show that the .rst-oder version of equilibrium logic can be used as a foundation for answer set inference. (shrink)

Summary In hisProgress and its Problems, Laudan dismisses the problem of incommensurability in science by endorsing two general assertions. The first claims there are actually no incommensurable pairs of theories or research traditions; the second maintains that his problem-solving model of scientific progress would be able rationally to appraise even incommensurable pairs of theories or traditions (are compare them for their progressiveness). I argue here that Laudan fails to provide a plausible defence of either thesis, and that this creates some (...) problems for his general approach. (shrink)

Does introspection grant us privileged insight into the intrinsic nature of the stuff of the world? Michael Lockwood 's startling answer is yes. Quantum mechanics may indeed supply a complete formal description of the universe. Yet what "breathes fire into" the quantum-theoretic equations, it transpires, isn't physical in the traditional sense at all.

In this article we examine the role which vindication plays in contract damages. Vindication describes the making good of a right by the award of an adequate remedy. We argue that, while the primary purpose of compensation is to provide an indemnity for loss, an award of compensatory damages will nevertheless generally vindicate the right to performance of the contract. We go on to consider a distinct measure of damages, vindicatory damages. These, we argue, are neither compensatory nor restitutionary, neither (...) loss-based nor gain-based: they are a rights-based remedy. We then identify various situations in which the courts may be seen to have awarded what are, in substance, vindicatory damages. We conclude by considering the benefits which may follow from recognition of the availability of vindicatory damages as a contract remedy. (shrink)

Transhumanists are ambitious. We want unlimited lifespan, unlimited intelligence, unlimited computer power. But this doesn't mean that we're ambitious about everything, for example height. Perhaps we want to be a bit taller, and we want to ensure that e.g. midgets have the opportunity to reach "normal" stature. Yet even in Second Life, or in tomorrow's immersive virtual realities, we don't for the most part want to be 1000 metres tall - despite freedom from the constraints of gravity. Of course, there (...) are some very exotic creatures in Second Life: they might say the rest of us have stunted imaginations. But intuitively, there is quite a narrow optimum for body height. Moreover, height may be regarded as what economists call a "positional good". It's socially advantageous to be slightly taller than average; but if everyone were to become taller, then no one would be better off. (shrink)

"Over the past half billion years, life on Earth has been governed by the pleasure pain axis. Nature is typically "red in tooth and claw". Consequently, life has typically been "nasty, brutish and short". However, a major evolutionary transition lies ahead. Natural selection has evolved organic robots with the capacity to rewrite their own source code. Humans will shortly be able to redesign our own reward circuitry, decommission natural selection, design compassionate ecosystems, and abolish suffering throughout the living world.

Stepping on a strongly electrified grid is highly aversive. A desperately hungry rat - even a rat who hasn't eaten for 10 days - won't run across an electrified cage-floor to reach a food-source: the shocks are too painful. But a rat with electrodes implanted in its neural reward circuitry will cross the grid, repeatedly, to gain the chance to self-stimulate its pleasure centres. Direct electrical stimulation of the mesolimbic dopamine system is so overpoweringly delightful that the anticipated reward eclipses (...) the immediate pain. (shrink)

The minimum performance rule applies where the defendant who has repudiated his contract would have had a choice as to how to perform it. The rule requires that damages be assessed on the basis that the defendant would have chosen to perform in the least onerous manner. Two principal criticisms of the rule are made. The first is that the rule’s fundamental assumption, that minimum performance is all the claimant is entitled to, rests on a flawed understanding of what it (...) means to have a choice as to how to perform a promise. The second is that the rule is wrongly applied to claims for consequential loss. Having shown that the rule has no remaining role, the conclusion reached is that it should be abandoned. (shrink)

Our current conception of intelligence as measured by IQ tests is “mind-blind”. IQ tests lack ecological validity because they ignore social cognition – the “mindreading” prowess that enabled one species of social primate to become the most cognitively successful on the planet. In this talk, I shall examine how to correct the ethnocentric and anthropocentric biases of our perspective-taking abilities. What future technologies can enrich our capacity to understand other minds? I shall also discuss obstacles to building empathetic AGI (artificial (...) general intelligence) - and why old-fashioned “autistic AI” may always be vulnerable to the cunning of “Machiavellian apes”. In an era of global catastrophic and existential risks, developing ways to enrich and “de-bias” mankind's capacity for empathetic cognition will be vital. This is because the greatest underlying risk to the wellbeing of life on Earth is the dominance behaviour of other male human primates. (shrink)

Though formal metascience has made rapid advances over the past few decades, it has seldom been seen to contribute much to the rational reconstruction of scientic development; for the most part, logical concepts have found application in the synchronic analysis of scientic theories. It should be important, therefore, to consider to what extent diachronic or dynamic aspects of scientic theorizing may also be captured within the connes of a formal metascientic framework, and what tools are best suited for constructing a (...) general model of theory dynamics. (shrink)

"This book constitutes the proceedings of the 1994 European Workshop on Logics in Artificial Intelligence, held at York, UK in September 1994. The 24 papers presented were selected from a total of 79 submissions; in addition there are two abstracts of invited talks and one full paper of the invited presentation by Georg Gottlob. The papers point out that, with the depth and maturity of formalisms and methodologies available in AI today, logics provide a formal basis for the study of (...) the whole field of AI. The volume offers sections on nonmonotonic reasoning, automated reasoning, logic programming, knowledge representation, and belief revision."--PUBLISHER'S WEBSITE. (shrink)

This volume contains the proceedings of JELIA '92, les Journ es Europ ennes sur la Logique en Intelligence Artificielle, or the Third European Workshop on Logics in Artificial Intelligence. The volume contains 2 invited addresses and 21 selected papers covering such topics as: - Logical foundations of logic programming and knowledge-based systems, - Automated theorem proving, - Partial and dynamic logics, - Systems of nonmonotonic reasoning, - Temporal and epistemic logics, - Belief revision. One invited paper, by D. Vakarelov, is (...) on arrow logics, i.e., modal logics for representing graph information. The other, by L.M. Pereira,J.J. Alferes, and J.N. Apar cio, is on default theory for well founded semantics with explicit negation. (shrink)

in How Many Questions?, ed. Leigh S. Cauman, Isaac Levi, Charles Parsons, and Robert Schwartz, Indianapolis: Hackett Publishing Co., 1983, pp. 276-300.