Metaphysical and epistemological commitments seem to determine the course of research in the field of logic as well as its theoretical interpretation. What we take the objects of logical investigation to be determines our views on how they are to be known, and our view of the possible types of knowledge in turn places restrictions on what kinds of things those objects could be. Perhaps it is true that logical studies can be pursued to great lengths without indulging in general (...) declarations about the nature of reality or of human knowledge. But to say this is very far from admitting the possibility of “logic without ontology.” The thoughtful beginning student in logic quickly wants to know what it is he or she is really studying and what, precisely, it has to do with the real worlds. The slightest philosophical stimulation will lead him or her, further, to ask about the evidence supporting the various sorts of claims made as the course progresses, and about the methodology of logic from a scientific point of view. Rarely is any answer given to such questions, much less a reasonable and well elaborated one. Questions of this type are usually discouraged and avoided by text books and instructors, and there may even be some suggestion that to ask them evidences confusion and stupidity. But when they are pressed it turns out that logic as a field of knowledge and inquiry remains in chaos at its philosophical foundations. I mean by this that the leading investigators cannot agree—indeed, they disagree in dimensions categorial—concerning what the subject of logical knowledge is, and concerning the modes of logical knowledge. (shrink)

Philosophers have ever declared that their problems lie at a different level from the problems of the empirical sciences. Perhaps one may agree with this assertion; the question is, however, where should one seek this level. The metaphysicians wish to seek their object behind the objects of empirical science; they wish to enquire after the essence, the ultimate cause of things. But the logical analysis of the pretended propositions of metaphysics has shown that they are not propositions at all, but (...) empty word arrays, which on account of notional and emotional connections arouse the false appearance of being propositions. This conception that the “propositions” of metaphysics, including those of ethics, have no theoretical content, is to be sure still disputed. We shall not, however, enter here on its demonstration, but, under its guidance, will limit ourselves to non-metaphysical and non-ethical philosophical problems. (shrink)