The present work critically examines two assumptions frequently stated by supporters of cognitive neuroenhancement. The first, explicitly methodological, assumption is the supposition of effective and side effect-free neuroenhancers. However, there is an evidence-based concern that the most promising drugs currently used for cognitive enhancement can be addictive. Furthermore, this work describes why the neuronal correlates of key cognitive concepts, such as learning and memory, are so deeply connected with mechanisms implicated in the development and maintenance of addictive behaviour so that (...) modification of these systems may inevitably run the risk of addiction to the enhancing drugs. Such a potential risk of addiction could only be falsified by in-depth empirical research. The second, implicit, assumption is that research on neuroenhancement does not pose a serious moral problem. However, the potential for addiction, along with arguments related to research ethics and the potential social impact of neuroenhancement, could invalidate this assumption. It is suggested that ethical evaluation needs to consider the empirical data as well as the question of whether and how such empirical knowledge can be obtained. (shrink)

Wie verhalten sich Ideen zu der materiellen Wirklichkeit, die sie abbilden wollen? In der Strukturanalyse der Platonschen Spiegel-Metapher findet der Autor den Schlüssel, um den Zusammenhang der materiellen Vielheit als universelles Reflexionssystem darstellen zu können und das menschliche In-der-Welt-sein als Moment des Naturverhältnisses zu begründen.

In Thomas Thomson's System of chemistry of 1802 Bergman and Scheele are actually considered as creators of the analytical concept of an element. With regard to this, a detailed investigation of the work of Bergman and Scheele shows that Thomson's statement contains mistakes as well as inadmissable simplifications and generalizations. It is correct, however, that Bergman in 1774–1777 specifically anticipated in essential aspects the analytical element concept proposed by Lavoisier in 1787–1789.

Toleration and respect belong to those concepts that in contemporary political debates are very frequently used, but also misused. This review article is an attempt to enter these discussions and clarify the meaning of the concepts. It is done through reference to the most advanced theory on toleration today, by the German philosopher Rainer Forst. Since his approach allows for ill-considered implications, in the final part of my article I introduce arguments that question some of them. It seems too far-reaching (...) to presuppose an ongoing process of advancement in toleration. Furthermore, one cannot argue that we have to establish a ranking in universal morality at the bottom and the particular ethicality above. Forst, however, explains toleration as a balanced conflict between universally accepted moral norms and particular ethical world-views. (shrink)

Heimsoeth enters boldly into the historical drama of Western philosophical thought at its deepest level and tells a story focused not so much on actors as on the plot itself: the great metaphysical questions about philosophy and life.

Onto-semiotisch kann man eine Theorie nennen, welche angibt, wo die Zeichen an die Welt anknüpfen. Wittgenstein hat über dieses Problem viel nachgedacht, ohne eine rechte Lösung zu finden. Erforderlich ist eine Konzeption, die beide Arten von Zeichen, Repräsentatoren wie Indikatoren zu vereinigen vermag. An eben dieser Aufgabe scheitert Saussure, dem es nicht gelingt, Mentalismus und Strukturalismus so zu verbinden, daß die Konkurrenz von Repräsentatoren und Indikatoren aufgehoben wird. Dies gelingt Heidegger in Sein und Zeit. Er fundiert die Repräsentationssemiotik so in (...) einer onto-semiotischen Lehre von den Verweisungen, daß schließlich der Weltbezug der Zeichen deutlich wird. (shrink)