Myxobacteria are social organisms that usually remain together even though they are not chemically attached to each other. They cooperatively feed and form aggregates and fruiting bodies. Their mode of movement, the forces and mechanisms that allow movement, the factors that keep them together, and the processes leading to the structures composed of many cells are only now beginning to be understood. Possibilities that may be key to their abilities are three models proposed elsewhere for different aspects of their biology. (...) One hypothesis attempts to explain mound and fruiting body formation by assuming that the cells move in circular patterns around the major cell mass. The second explains gliding motility on the existence of shunts that periodically short out the proton gradient across the cell membrane, causing expansion and contraction of portions of the cell. The third model proposes that occasionally cells arise that move unidirectional instead of back and forth. These few cells may lead the majority of cells in new directions. BioEssays 20:1030–1038, 1998. © 1998 John Wiley & Sons, Inc. (shrink)

There has been some controversy about whether or not in the 'Enneads' sensible matter is generated by a higher principle. If not, is sensible matter eternally self-subsisting? If so, what precisely is the manner of its generation? H.-R. Schwyzer argued that sensible matter is not generated because generation implies corruption. Kevin Corrigan, on the contrary, argued not only that sensible matter is generated but also that there are multiple generations of such matter. In this paper, the authors re-examine some key (...) texts and conclude that a careful reading of the 'Enneads' indicates that neither Schwyzer's nor Corrigan's account is plausible. Rather, in the 'Enneads' both intelligible matter and sensible matter are generated by higher principles in the sense that both eternally depend on these higher principles for their existence but not insofar as they have a beginning in time. Moreover, there is exactly one generation of sensible matter rather than multiple generations. (shrink)

An advanced constitution is proposed to allow the age-old conflict of religion and reason to evolve and progress as have other human institutions. No specific resolution is imposed, but rather all sides are prohibited from dismissing in the disputation that which they have already accepted in practice. We work back from points at issue to the common ground, and then work forward using forms of inference accepted by all in practice. This method has the appearance of an argumentum ad hominem, (...) but the intent is to subsume all parties under the same principles. We are left with those who reject all reason as such, the insane, the frivolous, the fanatic, and the coercive. Our constitution is able to bring in even this troublesome and disruptive population by using an aesthetic appeal that meets them where they are and shows that even their madness can be turned toward the good. (shrink)