We present an epistemological schema of natural sciences inspired by Peirce's pragmaticist view, stressing the role of the \emph{phenomenological map}, that connects reality and our ideas about it. The schema has a recognisable mathematical/logical structure which allows to explore some of its consequences. We show that seemingly independent principles as the requirement of reproducibility of experiments and the Principle of Sufficient Reason are both implied by the schema, as well as Popper's concept of falsifiability. We show that the schema has (...) some power in demarcating science by first comparing with an alternative schema advanced during the first part of the 20th century which has its roots in Hertz and has been developed by Einstein and Popper. Further, the identified differences allow us to focus in the construction of Special Relativity, showing that it uses an intuited concept of velocity that does not satisfy the requirements of reality in Peirce. While the main mathematical observation connected with this issue has been known for more than a century, it has not been investigated from an epistemological point of view. A probable reason could be that the socially dominating epistemology in physics does not encourage such line of work. We briefly discuss the relation of the abduction process presented in this work with discussions regarding ``abduction'' in the literature and its relation with ``analogy''. (shrink)

In the present essay we attempt to reconstruct Newtonian mechanics under the guidance of logical principles and of a constructive approach related to the genetic epistemology of Piaget and García. Instead of addressing Newton’s equations as a set of axioms, ultimately given by the revelation of a prodigious mind, we search for the fundamental knowledge, beliefs and provisional assumptions that can produce classical mechanics. We start by developing our main tool: the no arbitrariness principle, that we present in a form (...) that is apt for a mathematical theory as classical mechanics. Subsequently, we introduce the presence of the observer, analysing then the relation objective–subjective and seeking objectivity going across subjectivity. We take special care of establishing the precedence among all contributions to mechanics, something that can be better appreciated by considering the consequences of removing them: the consequence of renouncing logic and the laws of understanding is not being able to understand the world, renouncing the early elaborations of primary concepts such as time and space leads to a dissociation between everyday life and physics, the latter becoming entirely pragmatic and justified a-posteriori, changing our temporary beliefs has no real cost other than effort. Finally, we exemplify the present approach by reconsidering the constancy of the velocity of light. It is shown that it is a result of Newtonian mechanics, rather than being in contradiction with it. We also indicate the hidden assumption that leads to the contradiction. (shrink)

A model for the ideal state includes discussions of the nature and application of justice, the role of the philosopher in society, the goals of education, and the effects of art upon character.

In "Realism and Reason" Hilary Putnam has offered an apparently strong argument that the position of metaphysical realism provides an incoherent model of the relation of a correct scientific theory to the world. However, although Putnam's attack upon the notion of the "intended" interpretation of a scientific theory is sound, it is shown here that realism may be formulated in such a way that the realist need make no appeal to any "intended" interpretation of such a theory. Consequently, it can (...) be shown that realism is immune to Putnam's criticism and that attempts at reformulating this criticism are not likely to meet with success. (shrink)

In the present essay we attempt to reconstruct Newtonian mechanics under the guidance of logical principles and of a constructive approach related to the genetic epistemology of Piaget and García (Psychogenesis and the history of science, Columbia University Press, New York, 1989). Instead of addressing Newton’s equations as a set of axioms, ultimately given by the revelation of a prodigious mind, we search for the fundamental knowledge, beliefs and provisional assumptions that can produce classical mechanics. We start by developing our (...) main tool: the no arbitrariness principle, that we present in a form that is apt for a mathematical theory as classical mechanics. Subsequently, we introduce the presence of the observer, analysing then the relation objective–subjective and seeking objectivity going across subjectivity. We take special care of establishing the precedence among all contributions to mechanics, something that can be better appreciated by considering the consequences of removing them: (a) the consequence of renouncing logic and the laws of understanding is not being able to understand the world, (b) renouncing the early elaborations of primary concepts such as time and space leads to a dissociation between everyday life and physics, the latter becoming entirely pragmatic and justified a-posteriori (because it is convenient), (c) changing our temporary beliefs has no real cost other than effort. Finally, we exemplify the present approach by reconsidering the constancy of the velocity of light. It is shown that it is a result of Newtonian mechanics, rather than being in contradiction with it. We also indicate the hidden assumption that leads to the (apparent) contradiction. (shrink)

Is 'n transendentale kritiek religieus bepaald? deur V. Brümmer. -- Constitution and creativity in the philosophy of Edmund Husserl, by A. L. Conradie. -- Studium Generale, deur H. J. De Vleeschauwer. -- Sociology of law and its philosophical foundtions, by H. Dooyeweerd. -- Beginvrae en antwoorde in der Wysbegeerte, deur P. G. W. Du Plesis. -- Max Scheler's concern with the highest perfection, by S. I. M. Du Plessis. -- Christelike wetenskap, highest perfection, by S. I. M. Deu Plessis. -- (...) Christelike wetenskap, deur B. Duvenage. -- Malan's critical study, by H. Hart. -- Raakpunte vir 'n dialoog met 'n Christelike Wysbegeerte, deur A. M. T. Meyer. -- Nuwe gedagtes oor die begrip Natuurwet, deur A. H. Murray. -- Die voorwaardes vir die uitbou van 'n wysgerige antropologie, deur C. K. Oberholzer. -- De structuur van feit-en-betekenis, deur K. J. Popma. -- The relation of the arts to the presentation of the truth, by C. G. Seerveld. -- Gezag en vrijheid in het licht van Gods Woord, deur J. Stellingwerff. -- Voorveronderstellings vir 'n filosogie van die opvoeding, deur J. A. L. Taljaard. -- Objektiwiteit, sekularisasie en geskiedenis, deur N. T. Van der Merwe. -- Etiek: wetenskap van relasies, deur S. P. Van der Walt. -- Wetten en feiten, deur C. A. Van Peursen. -- Enige opmerkingen over entiteiten, deur H. Van Riessen. -- Richard Kroner on Herman Dooyeweerd, by C. Van Til. -- De mens in de taalkunde, deur P. A. Verburg, -- Enkele motieven van het anti-militair pacifisme, deur S, U. Zuidema. -- Publications of prof. dr. H. G. Stoker. Publikasies van prof. dr. H. G. Stoker (p. 303-311). (shrink)

Explaining the persistence of populations is an important quest in ecology, and is a modern manifestation of the balance of nature metaphor. Increasingly, however, ecologists see populations (and ecological systems generally) as not being in equilibrium or balance. The portrayal of ecological systems as “non-equilibrium” is seen as a strong alternative to deterministic or equilibrium ecology, but this approach fails to provide much theoretical or practical guidance, and warrants formalisation at a more fundamental level. This is available in adaptation theory, (...) which allows population persistence to be explained as an epiphenomenon stemming from the maintenance, survival, movement and reproduction of individual organisms. These processes take place within a physicochemical and biotic environment that persists through structured annual cycles, but which is also spatiotemporally dynamic and subject to stochastic variation. The focus is thus shifted from the overproduction of offspring and the consequent density dependent population pressure thought to follow, to the adaptations and ecological circumstances that support those relatively few individuals that do survive. (shrink)

Ecological theory is built upon assumptions about the fundamental nature of organism-environment interactions. We argue that two mutually exclusive sets of such assumptions are available and that they have given rise to alternative approaches to studying ecology. The fundamentally different premises of these approaches render them irreconcilable with one another. In this paper, we present the first logical formalisation of these two paradigms.The more widely-accepted approach - which we label the demographic paradigm - includes both population ecology and community ecology (...) (synecology). Demographic ecology assumes that the environment is relatively stable and that biotic processes, governed predominantly by resource availability, are the most important of ecological and evolutionary influences. Moreover, ecological processes are assumed to translate into directional selection pressures that drive significant evolutionary change on a local scale through the process of optimisation. (shrink)

This paper argues against the thesis of Professor Savan, that Spinoza's views about words and about the imagination are such that he could not consistently say, and indeed did not think, that philosophical truths can be expressed adequately in language. The evidence for this thesis is examined in detail, and it is argued that Spinoza should have distinguished between two types of imagination, corresponding roughly to Kant's transcendental and empirical imagination. Finally, it is suggested that the bulk of the argument (...) of the Ethics is conducted on the level of the ?second kind of knowledge?, reason, but that it also contains examples of the use of the first and third kinds of knowledge. (shrink)

The Routledge History of Philosophy, Volume 4 covers a period of three hundred and fifty years, from the middle of the fourteenth century to the early years of the eighteenth century and the birth of modern philosophy. The focus of this volume is on Renaissance philosophy and seventeenth-century rationalism, particularly that of Descartes, Spinoza, and Leibniz. Science was ascendant during the Renaissance and beyond, and the Copernican revolution represented the philosophical climax of the middle ages. This volume is unique in (...) its emphasis on the relationship between science and philosophy. Placing the philosophy of the age into its scientific, social and cultural context, it examines the scholastic thought which Renaissance philosophy both interacted with and reacted against. A grasp of the intellectual context of the rationalists is also critical to an understanding of this philosophical movement, and the writings of Bacon, Gassendi, Hobbes, and others are analyzed here. The Routledge History of Philosophy, Volume 4 provides a broad, scholarly introduction to this period for students of philosophy and related disciplines, as well as some original interpretations of these authors. It will be important reading both for the specialist and the general reader. It includes a glossary of over one hundred technical terms and a chronological table of philosophical, scientific, and other cultural events. (shrink)

G H Bantock; The Parochialism of the Present: some reflections on the history of educational theory, Journal of Philosophy of Education, Volume 13, Issue 1, 30.