Theoria: An International Journal for Theory, History and Foundations of Science

The “Centro de Estudios Cientificos” (CEC) of San Sebastian was established to palliate the absence of universitary studies in the Basque Country, in base of an idea suggested by J. Rey Pastor. It began itsactivities in 1932 and ended in 1936, because of Spanish Civil War. It was supported by the “Sociedad de Estudios Vascos” and sponsored by the “Diputación Foral de Gipuzkoa” and the San Sebastian Council. In this paper, we describe and comment the different aspects relatives to the CEC such as constitution, statutes, members, sections, courses, teachers, students, ... , and scientific journals supported by the CEC.

This paper analyses the ancient atomism from a modern point of view. It focuses its attention on the essential properties of clasical atoms. First, it considers the principles of the atomist ontology and the concept of void. Then, it studies the concept of atom and its fundamental properties: shape, size, weight, and motion. It discusses three significant problems of the clasical atomism: i) the theoretical character to the atoms and their resemblances and differences with respect to the macroscopical bodies; ii) the atomist explanation and its limits; and iii) the visual representation of the atoms. Finally, it outlines some reasons which indicate a radical change and the very dissolution of the classical concept of particle in the field of the contemporary physical science.

Roger Boscovich, belonging to XVIII century, halfway from Newton to Faraday, is traditionally considered as a newtonian philosopher. Nevertheless, following Berkson’s suggestion, he could be a Field Theory forerunner. In this work, we will try to go on with the idea of this suggestion in order to show this possible Boscovich’s contribution.

This paper explores some of the philosophical difficulties involved in the task of clarifying the idea of an irreducible statistical law, by means of an analysis of the paradigmatic example of such a law in the Quantum theory.These are two alternative strategies that can be pursued in clarifying this question. One is to understand this irreductibility by means of one or another interpretation of the Quantum theory. But, as will be shown, the different interpretations of Quantum mechanics lead to radically different and fundamentally incompatible answers to the problem. The second strategy is to try to caracterize this irreducibility “directly”, via a proof of the impossibility of a hidden-variable extension of the statistical formalism of the theory. This strategy culminates with Bell’s theorem which indeed establishes the impossibility of constructing “Iocal” theories of hidden variables. This impossibility result, however, fails to provide us with a satisfying interpretation of the quantum irreductibility, rather, it merely shows how far we are from a solution to the problem.

Genetic studies of present human populations are very useful to understand the history of modern Human migrations throughout the world, especially when the results are compared with the information provided by historical linguistics and archaelogy. However, an inaccurate methodology is commonly applied to the analysis of the most recent molecular data and may lead to some erroneous conclusions on our first origins.

The aim of this article is to show that the scholastic commentaries on the Predicables or Categorems (in Porphiry Eisagoge) constituted a style of treatises on the philosophy of language and philosophy of logic. In such studies, called afterwards “Material Logic”, is considered, for instance, the theme of the domain of logic and the possibility of its construction; furthermore, logic is relates to ontology through the problem of universals. Here is explored to logical being (ens rationis) which is the objectum (subject) of this discipline, and is analized the structure of proposition and the nature of the main constitutives of inference. In the side of Philosophy of Language are located the study of the meaning of subjects and predicates (or predicables), that of the proposition formed by them, also a hierarchy of logical types (and semantical ones), and the principles of the ordained disposition of natural kinds and other classifications. They are things that now attract the interest of philosophers of logic and philosophers of languagewithin the analytic tradition.

In this paper I offer an interpretation of those paragraphs of Wittgenstein’s Tractatus in which Wittgenstein talks about negative facts. In my opinion we cannot conclude that Wittgenstein held that negative facts have actual existence, as RusselI, for example, did.By means of a kind of journey through several possible interpretations, I arrive to the conclusion that negative facts are nothing but non-effective possibilities; they are in the logical space, in the field of possible worlds, but they have no actual existence, they are not inhabitants of the world. Finally, it is suggested that, insofar as pictures are facts, the only negative facts were, for Wittgenstein, the negative pictures and not what those pictures depict.