Solipsism is an extreme position. Ludwig Wittgenstein addressed this position several times over more than 20 years. Wittgenstein first became familiar with solipsism under the title of “theoretical egoism” when reading Schopenhauer at the tender age of 16. Elizabeth Anscombe related a personal conversation in which Wittgenstein said that Schopenhauer's theory of the world “as idea” struck him as fundamentally right, if in need of a few clarifications and adjustments, but that he opposed the theory of the world as will. (...) Wittgenstein's first philosophy was that of Schopenhauer and he was only liberated from it by Frege's conceptual realism. According to Schopenhauer, an “organic” philosophy needs an organic exposition. An organic philosophy stands in contrast to systematic philosophy, which argues sequentially “in the form of a chain” of propositions starting from one fundamental principle. Wittgenstein's overarching aim in the Tractatus is to delimit sense by expounding the limits for the expression of thoughts in language. (shrink)

This critical study concentrates on action-theoretical aspects of the Davidsonian philosophy of social science given in Macdonald/pettit 1981. It questions the relevance to social science of developing Davidson’s semantic “principle of charity” into a “principle of humanity”, discusses specific formulations of assumptions of behavioural and attitudinal rationality in the explanation of action, and joins issue with the causal account given of the latter suggesting that its metaphysical motivation is of no concern to social science.