Intuitionists and classical logicians use in common a large number of the logical axioms, even though they supposedly mean different things by the logical connectives and quantifiers — conquans for short. But Wittgenstein says The meaning of a word is its use in the language. We prove that in a definite sense the intuitionistic axioms do indeed characterize the logical conquans, both for the intuitionist and the classical logician.

Environmental ethics has traditionally focused on a defense of the intrinsic value of animals and wild habitats. However, this ethical project needs to be supplemented by a consideration of the kind of culture that can take such an ethical point of view seriously. This essay argues that one component of an environmentally responsible culture is its domesticated environment. How we construct the domesticated environment has an impact on our perception of our own identities and our relations to wild nature. If (...) we care about wild nature, we must also care about the domesticated environment in which we live our lives. This essay contributes to an ethical reflection on the need to overcome the traditional dualism between domesticated and wild, built and natural that permeates environmental ethical thinking. (shrink)

Dmitri Mendeleev, while not creatively a philosopher of science, nor a student of systematic philosophy, was eminently a philosophical scientist. Concern about the nature and foundations of his science is evident throughout the text and footnotes of the Principles of Chemistry. One has to presume that his conclusions provided him with some direction for “the study of his great generalizations” in chemistry, especially for the greatest fruit of his efforts, the Periodic System of the Elements. At least it is apparent (...) that somehow he acquired a much greater confidence in the feasibility of systemizing extant chemical knowledge than almost any of his contemporaries. (shrink)

According to familiar accounts, Rousseau held that humans are actuated by two distinct kinds of self love: amour de soi, a benign concern for one's self-preservation and well-being; and amour-propre, a malign concern to stand above other people, delighting in their despite. I argue that although amour-propre can (and often does) assume this malign form, this is not intrinsic to its character. The first and best rank among men that amour-propre directs us to claim for ourselves is that of occupying (...) 'man's estate'. This does not require, indeed it precludes, subjection of others. Amour-propre does not need suppression or circumscription if we are to live good lives; it rather requires direction to its proper end, not a delusive one. (shrink)

The area of investigation known as general systems theory or research features the study of systems as interesting in its own right or one fruitful approach to the study of science in general. This leads to an interesting and still open problem, namely, explicating the concept of a system that seems to unify the interests of researchers in this area. Contrary to received opinion, I argue that there is a unique and interesting concept of a system that underlies the expressed (...) interests of general systems researchers and that it can be given a satisfactory explication. The concept in question has systems as extralinguistic entities that we theorize about, namely, certain sorts of sets of re-related elements. Criteria for its explication are suggested; examples of systems, earlier analyses, and various objections are all considered in leading up to a partial formal explication of the concept and a statement of additional open problems. (shrink)

Robert Boyle's corpuscular philosophy was an important instance in the history of thought of a use of metaphysical principles in formulating new methods for physical science. Since Boyle nowhere completely and explicitly discussed his metaphysic, I shall undertake to reconstruct it and trace its influence on his scientific work.