In this book, Yaqub describes a simple conception of truth and shows that it yields a semantical theory that accommodates the whole range of our seemingly conflicting intuitions about truth. This conception takes the Tarskian biconditionals as correctly and completely defining the notion of truth. The semantical theory, which is called the revision theory, that emerges from this conception paints a metaphysical picture of truth as a property whose applicability is given by a revision process rather than by a fixed (...) extension. The main advantage of this revision process is its ability to explain why truth seems in many cases almost redundant, in others substantial, and yet in others paradoxical. Yaub offers a comprehensive defense of the revision theory of truth by developing consistent and adequate formal semantics for languages in which all sorts of problematic sentences can be constructed. Yaqub concludes by introducing a logic of truth that further demonstrates the adequacy of the revision theory. (shrink)

This book takes a bold new look at ways of exploring the nature, origins, and potentials of consciousness within the context of science and religion.

Neuronal aggregates involved in conscious awareness are not evenly distributed throughout the CNS but comprise key components referred to as the neural network correlates of consciousness (NNCC). A critical node in this network is the posterior cingulate, precuneal, and retrosplenial cortices. The cytological and neurochemical composition of this region is reviewed in relation to the Brodmann map. This region has the highest level of cortical glucose metabolism and cytochrome c oxidase activity. Monkey studies suggest that the anterior thalamic projection likely (...) drives retrosplenial and posterior cingulate cortex metabolism and that the midbrain projection to the anteroventral thalamic nucleus is a key coupling site between the brainstem system for arousal and cortical systems for cognitive processing and awareness. The pivotal role of the posterior cingulate, precuneal, and retrosplenial cortices in consciousness is demonstrated with posterior cingulate epilepsy cases, midcingulate lesions that de-afferent this region and are associated with unilateral sensory neglect, observations from stroke and vegetative state patients, alterations in blood flow during sleep, and the actions of general anesthetics. Since this region is critically involved in self reflection, it is not surprising that it is similarly a site for the NNCC. Interestingly, information processing during complex cognitive tasks and during aversive sensations such as pain induces efforts to terminate self reflection and result in decreased processing in posterior cingulate and precuneal cortices. (shrink)

On Islamic standards of basic needs of human beings.

This essay explains the inescapability of moral demands. I deny that the individual has genuine reason to comply with these demands only if she has desires that would be served by doing so. Rather, the learning of moral reasons helps to shape and channel self- and other-interested motivations so as to facilitate and promote social cooperation. This shaping happens through the “embedding” of reasons in the intentional objects of motivational propensities. The dominance of the instrumental conception of reason, according to (...) which reasons must be based in desires of the individual, has made it harder to recognize that reasons shape desires. I attempt to undermine this dominance by arguing that the concept of a self that extends over time is constructed to meet the demands of social cooperation. Prudential reasons to act on behalf of the persisting self's desires are often taken to constitute the paradigm of reasons based on desires of the individual. But such reasons, along with the very concept of the persisting self, are constructed to promote human cooperation and to shape the individual's desires. (shrink)

In this collection, Stations on the Journey of Inquiry, David Burrell launches a revolutionary reinterpretation of how any inquiry proceeds, boldly critiquing presumptuous theories of knowledge, language, and ethics. While his later publications, Analogy and Philosophical Language (1973) and Aquinas: God and Action (1979), elucidate Aquinas's linguistic theology, these early writings show what often escapes articulation: how one comes to understanding and "takes" a judgment. Although Aquinas serves as an axial figure for Burrell's expansive corpus of scholarship spanning more than (...) fifty years, this selection of essays presents other positions and counterpositions to whom his own philosophical theology is beholden: Plato, Aristotle, Cajetan, Kant, Peirce, Moore, Wittgenstein, Sellars, Weiss, Ross, McInerny, and Lonergan. With renewed interest in philosophy of language by postmodern thinkers as well as in the wake of Mulhall's Stanton Lectures on Wittgenstein and "Grammatical Thomism," the publication of these formative writings proves timely for the academy at large. Burrell invites us to reconsider not only the way in which we conduct an inquiry, but what it is we take language to be and how we take responsibility for what we say. (shrink)

Chaos theory is a rapidly growing field. As a technical term, chaos refers to deterministic but unpredictable processes being sensitively dependent upon initial conditions. Neurobiological models and experimental results are very complicated and some research groups have tried to pursue the neuronal chaos. Babloyantz's group has studied the fractal dimension (d) of electroencephalograms (EEG) in various physiological and pathological states. From deep sleep (d=4) to full awakening (d>8), a hierarchy of strange attractors paralles the hierarchy of states of consciousness. In (...) epilepsy (petit mal), despite the turbulent aspect of a seizure, the attractor dimension was near to 2. In Creutzfeld-Jacob disease, the regular EEG activity corresponded to an attractor dimension less than the one measured in deep sleep. Is it healthy to be chaotic? An active desynchronisation could be favourable to a physiological system. Rapp's group reported variations of fractal dimension according to particular tasks. During a mental arithmetic task, this dimension increased. In another task, a P300 fractal index decreased when a target was identified. It is clear that the EEG is not representing noise. Its underlying dynamics depends on only a few degrees of freedom despite yet it is difficult to compute accurately the relevant parameters.What is the cognitive role of such a chaotic dynamics? Freeman has studied the olfactory bulb in rabbits and rats for 15 years. Multi-electrode recordings of a few mm2 showed a chaotic hierarchy from deep anaesthesia to alert state. When an animal identified a previously learned odour, the fractal dimension of the dynamics dropped off (near limit cycles). The chaotic activity corresponding to an alert-and-waiting state seems to be a field of all possibilities and a focused activity corresponds to a reduction of the attractor in state space. For a couple of years, Freeman has developed a model of the olfactory bulb-cortex system. The behaviour of the simple model without learning was quite similar to the real behaviour and a model with learning is developed. (shrink)

This essay reflects on 25 years since Christian Bioethics began publication and, in somewhat autobiographical fashion, engages two core concerns. First, although “non-ecumenism” may often appear a pretext for contention and division, I suggest that a respectful non-ecumenism may provide the opportunity for dialogue and the occasion for employing certain tools from religious studies. Second, although many are skeptical about the possibilities of identifying a “common morality,” a defense of that notion provides a plausible explanation for the development of limited (...) consensus on some issues in bioethics. (shrink)

Modern science developed in the interflow of culture between west and east. Combing of pratice technology with philosophic thoughts formed experimental method. Holistic views contacting atomism produced system theory. System thoughts are applicated in the science and engineering of biosystems, and the cencepts of system biomedicine (Kamada T.1992), systems biology (Zieglgansberger W, Tolle TR.1993), system bioengineering and system genetics (Zeng BJ. 1994) were established. From positive to synthetic thoughts, philosophy have been developed ontology, cosmology, organism theories. Structurity is structure logic (...) system founded on entity, develop, exist axioms, tolerance, adaptation, fluctuate, interweave, transform theorems and integrate, adaptation, construct laws. Structurity be discussed on the cosmos, life, culture system, creation, hologram theories of structure ontology, construct mutation, simi-structure organism and entity emergence, symbol implication. From the relation of structure, function and development, the structurity put forward the cycle, spiral, triangle structure stability patterns of self-organization in structure complement each other and stratification, functional couple and interflow bounds growth, coordinativetransformation and holographic symmetry. (shrink)