Moritz Schlick’s work shaped Logical Empiricism and thereby an important part of philosophy in the first half of the 20th century. A continuous thread that runs through his work is a philosophical diagnosis of the ‘great errors in philosophy’: philosophers assume that there is intuitive knowledge/knowledge by acquaintance. Yet acquaintance, it is not knowledge, but an evaluative attitude. In this paper I will reconstruct Schlick’s arguments for this conclusion in the light of his early practical philosophy and his reading of (...) Schopenhauer’s The World as Will and Idea. Having the historical roots of Schlick’s position in view will put us in a position to explore and question its presuppositions. (shrink)

In early major works, Cassirer and Schlick differently recast traditional doctrines of the concept and of the relation of concept to intuitive content along the lines of recent epistemological discussions within the exact sciences. In this, they attempted to refashion epistemology by incorporating as its basic principle the notion of functional coordination, the theoretical sciences' own methodological tool for dispensing with the imprecise and unreliable guide of intuitive evidence. Examining their respective reconstructions of the theory of knowledge provides an axis (...) of comparison along which to locate Cassirer's Neo-Kantianism and Schlick's pre-positivist empiricism, and an immediate background of contrast to the subsequent rise of logical empiricism. For in the absence of intuition all our knowledge is without objects and therefore remains entirely empty. (Kant A62/B87) And how awkward is the human mind in diving the nature of things when forsaken by the analogy of what we see and touch directly? (Boltzmann 1895). (shrink)

It is not well known that Moritz Schlick, whose name is inseparable from the development of logical positivism, was extremely critical of positivism prior to the 1920’s. The positivism Schlick found fault with was associated with the physicist Ernst Mach. Schlick went to considerable lengths to criticize Machian positivism on both epistemological and ontological grounds. He also objected to the positivist claim to be able to account for relativity theory within its framework.Schlick’s views before his move to Vienna in 1922 (...) have been labeled a “critical empiricist realism” (see Feigl 1938, p. xx) or a “structural realism” (Friedman 1983, p. 501). His exposure to the work of Ludwig Wittgenstein is generally held up as the crucial factor in turning him away from his early realist views towards positivism. There is general acknowledgment of a major change in Schlick’s philosophical thinking in the early 20’s; disagreement exists, however, over both the extent of the change and whether it was a positive or negative one. (shrink)

Schlick has been accused of a number of philosophical sins over the years, most notably his rather casual, and frequent, traversing of the borders between language, experience, and reality. While we allow our scientists the freedom to roam creatively throughout the peripheral regions of Epistemology and Metaphysics, we are not so tolerant of our philosophers. We know that Schlick gave up the physics laboratory for the philosopher’s armchair, and we expect him to stick to a particular position.Schlick’s colleagues in the (...) Vienna Circle were not totally blameless in this regard, either, and it may be that part of the charm of their work is precisely their inability to stick to the positions that solidified over 2500 years of western philosophy. (shrink)