Keine ausführliche Beschreibung für "Mensch und Schicksal" verfügbar.

ZusammenfassungIn der Debatte um die embryonale Stammzellenforschung führen die Verfechter der Würde des Embryos gerne eine Gemeinsamkeit von Embryonen und reversibel Komatösen an: Beide sind bloß potentiell Personen. Wenn aber Komatösen fraglos personale Würde zukommt, weshalb sollte man sie Embryonen absprechen? In ihrem AufsatzIn dubio pro embryone kombinieren G. Damschen und D. Schönecker diese Analogie mit einem Vorsichtsargument: Weil die Analogie zumindest gute Gründe für die Annahme biete, Embryonen komme eine menschliche Würde zu, sei angesichts der Schwere des möglichen Unrechts (...) die embryonale Stammzellenforschung nicht zu verantworten. Im Folgenden möchte ich darlegen, weshalb die Analogie nicht ausreicht, um ein solches Vorsichtsargument zu etablieren. In einem ersten Schritt soll gezeigt werden, wie man der Analogie begegnen kann, weshalb das entsprechende Argument also nicht zwingend ist. Um ein Vorsichtsargument zu begründen, würde es allerdings genügen, wenn die Analogie „hinlänglich plausible“ Gründe zugunsten der Würde von Embryonen liefert. In einem zweiten Schritt soll daher – aufbauend auf allgemeinen Überlegungen zum Vorsichtsargument – dargelegt werden, dass die Analogie selbst unter dieser Annahme nicht überzeugen kann. (shrink)

ABSTRACT A propositional temporal logic is introduced whose operators quantify over intervals of a reference time line. The intervals are specified symbolically, for example ?next week's weekend?. The specification language for the intervals takes into account all the features of real calendar systems. A simple statement which can be expressed in this language is for example: ?yesterday I worked for eight hours with one hour lunch break at noon?. Calendar Logic can be translated into propositional logic. Satisfiability is therefore decidable. (...) Since the translation is exponential, a tableau decision procedure for checking decidability is presented as an alternative. (shrink)

Keine ausführliche Beschreibung für "Friedrich Engels und die wegweisende Bedeutung der Philosophie für die Naturwissenschaft" verfügbar.

The generally covariant Lagrangian densityG = ℛ + 2K ℒmatter of the Hamiltonian principle in general relativity, formulated by Einstein and Hilbert, can be interpreted as a functional of the potentialsg ikand φ of the gravitational and matter fields. In this general relativistic interpretation, the Riemann-Christoffel form Γ kl i = kl i for the coefficients г kl i of the affine connections is postulated a priori. Alternatively, we can interpret the LagrangianG as a functional of φ, gik, and the (...) coefficients г kl i . Then the г kl i are determined by the Palatini equations. From these equations and from the symmetry г kl i = г lk i for all matter fields with δℒ/δΓ=0 the Christoffel symbols again result. However, for Dirac's bispinor fields, δℒ/δΓ becomes dependent on the Dirac current, essentially with a coupling factor ∼Khc. In this case, the Palatini equations define a new transport rule for the spinor fields, according to which a second universal interaction results for the Dirac spinors, besides Einstein's gravitation. The generally covariant Dirac wave equations become the general relativistic nonlinear Heisenberg wave equations, and the second universal interaction is given by a Fermi-like interaction term of the V-A type. The geometrically induced Fermi constant is, however, very small and of the order 10−81erg cm3. (shrink)

We discuss the possibility of “fifth forces” in relativistic gravitation theories of fourth order. The fifth force may be an analog to the “weak forces” in the theories of electroweak interactions.

Einstein's conform-invariant light metrics g'ik=(WiklmWiklm)1/2 glk imply a Machian cosmology and exclude conformally flat space-times.

Analogical thinking, relations between microcosm and macrocosm, polarity and intensification, inspiration, magical, alchemistic, and magnetic/sympathetic concepts: key terms like these indicate the importance of the traditions of pansophist and holistic interpretation of the world in Goethe's literary and scientific works. Of equal significance is his engagement with 'universal wisdom' (Weltweisheit), as embodied in the philosophical and scientific tendencies of the age he lived in. The Geneva conference of the Swiss Goethe Society documented here casts light on Goethe's position in the (...) rivalries tensions between old and new in his day. (shrink)

This paper considers the concept of freedom in behavioural terms, defining it in relation to freedom of action. This notion is applied to psychiatric abnormalities, and it is suggested that this new way of looking at the problem may go some way to surmount the philosophical difficulties normally attaching to the notion of freedom.

Radical Constructivism and Constructionism. Both radical constructivism and constructionism are naturalized approaches to epistemology. They try to fertilize results from biology and psychology for epistemological aims. They both refuse epistemological realism as unsustainable metaphysics. This raises the problem of the range of the naturalistic approach to epistemology. Constructivism, in both forms, turns out to be untenable because it runs in an aporia: it must borrow from realism either, or it must qualify its own position as a metaphysical one. But therewith, (...) constructivism would be blamed to be metaphysical itself. (shrink)

Reminiscing on the fact that E. Schrödinger was rooted in the same physical tradition as M. Planck and A. Einstein, some aspects of his attitude to quantum mechanics are discussed. In particular, it is demonstrated that the quantum-mechanical paradoxes assumed by Einstein and Schrödinger should not exist, but that otherwise the epistemological problem of physical reality raised in this context by Einstein and Schrödinger is fundamental for our understanding of quantum theory. The nonexistence of such paradoxes just shows that quantum-mechanical (...) effects are due to interference and not to interaction. This line of argument leads consequently to quantum field theories with second quantization, and accordingly quantum theory based both on Planck's constant h and on Democritus's atomism. (shrink)

Most of the reports on synthetic biology include not only familiar topics like biosafety and biosecurity but also a chapter on ‘ethical concerns’; a variety of diffuse topics that are interrelated in some way or another. This article deals with these ‘ethical concerns’. In particular it addresses issues such as the intrinsic value of life and how to deal with ‘artificial life’, and the fear that synthetic biologists are tampering with nature or playing God. Its aim is to analyse what (...) exactly is the nature of the concerns and what rationale may lie behind them. The analysis concludes that the above-mentioned worries do not give genuine cause for serious concern. In the best possible way they are interpreted as slippery slope arguments, yet arguments of this type need to be handled with care. It is argued that although we are urged to be especially vigilant we do not have sufficiently cogent reasons to assume that synthetic biology will cause such fundamental hazards as to warrant restricting or refraining from research in this field. (shrink)

Quasi-equational logic concerns with a completeness theorem, i. e. a list of general syntactical rules such that, being given a set of graded quasi-equations Q, the closure Cl Q = Qeq Fun Q can be derived from by the given rules. Those rules do exist, because our consideration could be embedded into the logic of first order language. But, we look for special (quasi-equational) rules. Suitable rules were already established for the (non-functorial) case of partial algebras in Definition 3.1.2 of (...) [27], p. 108, and [28], p. 102. (For the case of total algebras, see [35].) So, one has to translate these rules to the (functorial) language of partial theories .Surprisingly enough, partial theories can be replaced up to isomorphisms by partial Dale monoids (cf. Section 3), which, in the total case are ordinary monoids. (shrink)