Outside France the epistemology of G. Bachelard is unknown ; in France his influence is considerable, especially on philosophers like L. Althusser, M. Foucault, G. Canguilhem, J. Hyppolite, M. Serres, G. G. Granger, D. Lecourt and many others. Bachelard occupies a strategic point on the crossroads of all theoretical debates concerning science. The fact that he seems to give satisfactory answers on the problems which have risen after the breakdown of the logical-positivistic philosophy of science, justifies an exposition and evaluation (...) of his original contribution to philosophy. The author distinguishes the following items. 1. The determination of Bachelards philosophy as a scientific philosophy which is wedded to a history of the sciences, especially the natural sciences. 2. The 'systematicity' as the criterium of science against other, traditional, criteria like empiricalness, logical deducibility, correspondence with reality and so on. 3. The rectification-principle : the formation of a scientific system cannot be conceived otherwise than as the restructuring or reorganisation of the ruling system or system-sets. 4. The transformation of scientific knowledge shows many discontinuities in all its phases and branches. Bachelard calls them ruptures. 5. The translation of a theory into another, more coherent and comprehensive one, is baptised as a 'dialectisation' of the concept. By a dialectisation a system is both generalised and specified. Formal logic, which is based on identity and the principle of the excluded middle, is not able to interprete this dynamic aspect of scientific thinking. 6. Central in Bachelards philosophy is also the concept of recurrence. Each new organisation of the scientific system (global or partial) sheds new light on their history and their logical foundations. History has to be rewritten after each progress. Recurrence, however, also has systematic implications. Science always desimplifies its own evidences. 7. The scientist has to demolish the obstacles which he made himself by surcharging the content of the concepts not in use and by not assimilating them in the system. 8. Bachelards philosophy of science is both idealistic and realistic ; the phenomenology becomes phenomenotechnique under the hands and in the brains of the scientist. 9. He always denies (negativity) the earlier theories and objects by incorporating them in new relationships. 10. This constructive aspect of theory formation is the same in natural science and mathematics. Bachelard opposes the logical-positivistic idea that these are methodically dissimilar. In a critical commentary the author discusses the question of 'dialectical logic' in the sciences, in relation to some recent research in this field by I. Lakatos en Errol E. Harris. In his opinion the epistemology of Bachelard affords a creative renewal of the understanding of science, although further research is needed in many aspects. (shrink)

Overzicht van de invloed van klassieke auteurs op het werk van de Nederlandse wijsgeer.

ABSTRACT Both the general structure of Nozick's entitlement theory of justice and the particular arguments he directs against Rawls presuppose a conception of the person. The essay argues that this initial conception of the person is flawed and that Nozick must amend it. However, those amendments lead either to an equally flawed conception or to a conception which is substantially similar to that which Rawls invokes. On either possibility the entitlement theory is weakened. The argument has two steps. First, the (...) initial conception of the person which emerges from Anarchy, State and Utopia is stated. Second, the problems with that initial conception lead to the elucidation of subsequent conceptions, only the last of which is capable of avoiding those problems. The cost of avoidance is, however, a high one for Nozick's arguments against Rawls, in particular, and the entitlement theory in general. (shrink)

In an almost forgotten passage of the Postenor Analytics (Bk I, ch. III) Aristotle argues against 'another school', according to which it is possible to proof things 'by each other and in a circle'. His logical refutation of this opinion became so dominant in the Western philosophical tradition, that the 'vicious circle' has always deemed a crime since. A scientific demonstration has to be built on firm premisses in order to deduce conclusions from them in a straight, ongoing proces, in (...) which one does not have to return to the premisses for a reconsideration of them on the basis of their implications. Although Aristotle does not mention names, he in fact reacts against Plato and the mainstream of Greek thought, which stresses the essential circularity of human argumentation. In the first, the historical part of the treatise the roots of this circular logic are unearthed in the work of Heraclitus and Parmenides, who both defended a ring structure of their metaphysical explication of nature. Truth is described as well-rounded, because you can follow it in a circle, passing through each of its links in turn, back to your startingpoint. The association of circular motion with thought is fully present in the work of Plato, who speeks many times about the 'periforas tès dianoias' and the essential interdependance of our ideas. Not the theory of an anonymous alternative school but Aristotle's own rectilinear formal logic was the exceptional, untraditional standpoint, which, moreover, was in conflict with his explication of divine thinking as 'noèsis noèseôs'. In modern times Hegel, Nietzsche and Heidegger were the main representatives of an anti-Aristotelian attitude. All three reject the logical prohibition of the circular argument, because it is inadequate to the life of concrete scientific thinking. The path of science always turns around towards its origins and results in a correction of its fundamental hypotheses on a higher level. Circularity is considered as a hallmark of sound logical procedure, as a characteristic of excellence in human understanding. The famous 'hermeneutic circle' is interpreted as the modern equivalent of the Hegelian 'Kreislauf and the Greek ' to par'allèlôn'. In the second, the more systematic part of the text the circular nature of our cognitive and scientific behaviour is demonstrated along three different lines. Reflection on the natural language with its finite stock of words, whose meanings are structurally connected, leads us to the so called semiotical circularity. Natural language is a complex network in which circular argumentation is not only unavoidable, but even the only means of explication. We have to work with the material contained in our dictionary, in which the items are defined by each other. The second reason is constituted by the system-orientation of science. In science we try to systematize our knowledge by means of formalisations and abstractions. The development of science can be characterised as a succession of systems, in which every element gets its meaning from the whole organisation. If we accept systematicity as the arbiter of truth, our logic is anti-fundamentalistic and the path of our thought is in fact circular (or better : spiralistic). The third adstruction of our theory is afforded by the coupling, that is realised in a rational proof. We draw conclusions from the coherence of our perceptions, from the reciprocal implications of our ideas. Never any of our ideas is without the repercussions of the movements elsewhere in the field. When we proof something, we also disproof and correct our startingpoints at the same time. The tradition of the circular nature of human thinking is very old, but not antiquated. The accusation of committing a fallacy in the case of circularity in normal and in scientific thinking is unfouded. It is now the formal logicians turn to defend his claim. (shrink)

Combinatie van vertaling en uitleg van de 'Ethica', het hoofdwerk van de Nederlandse filosoof (1632-1677).

Gravity was a major theme in the seventeenth century scientific discussion. Trendsetters in the renewal of natural science were Galilei and Descartes. The first required a unified theory of all phenomena of gravity ; the second provided one with his vortex-hypothesis, which explained gravity by the mechanical push of subtile bodies of the vortex. This conception was tested and generally followed by Christiaan Huygens, whereas Newton presented the laws of the so called 'attraction' by which he did not at all (...) indicate the causes of those laws of motion. Spinoza comes on the scene of polemics as a critical Cartesian. Motion (of which downward motion of heavy bodies is only one instance) was explained by Descartes, but not so the rest of bodies or the equilibrium in the power relation between opposite forces, neither the reason why in some cases the particles form a hard body. Full fledged mechanism and consistent determinism lead Spinoza to account for rest and solidity in the same way, namely by means of the pressure of small and mostly unvisible bodies in the whirling environment. This paradoxical law was acknowledged as a real and important contribution to physical science by the Dutch spinozistic Cartesians Cuffeler and Overkamp, by the mathematician De Volder, by Spinoza's younger friend Tschirnhaus and in France by Malebranche. By the end of the century it was quite normal to speak about „the gravity of the air” and to consider the gravity of gross bodies as an illusion. (shrink)

After some preliminaries on the logic of change and the logic of action the author develops an extended theory of norms in this companion volume to his The Varieties of Goodness. Although the book will be of particular interest to deontic logicians, its philosophic value is greatly enhanced by a concern for broader issues, including problems in the ontology of norms. The usefulness of the work is very much decreased by numerous undeveloped suggestions and unanswered questions.—F. W. N.

This book contains important technical innovations, including comparative measures for the testable content, depth, and unity of scientific theories. Originally published in 1984. The Princeton Legacy Library uses the latest print-on-demand technology to again make available previously out-of-print books from the distinguished backlist of Princeton University Press. These editions preserve the original texts of these important books while presenting them in durable paperback and hardcover editions. The goal of the Princeton Legacy Library is to vastly increase access to the rich (...) scholarly heritage found in the thousands of books published by Princeton University Press since its founding in 1905. (shrink)

Vertaling (verkorte versie) van en commentaar op de wijsgerige verhandeling van de Nederlandse filosoof (1632-1677) over de betekenis van het christendom.