Erlebnis und Ausdruck

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After completing the first part of his Philosophical Investigations, Wittgenstein's post-war manuscripts up to 1949 focus on the nature of certain psychological concepts. These manuscripts serve as a basis for reconstructing his central arguments and conceptual elucidations from that period. A continuity in his thought emerges through foundational problems and reflections on language games. Notably, he attempts systematic analyses of psychological concepts and critiques Köhler's Gestalt psychological notion of visual objects. A key theme in Wittgenstein's later work is the connection between instinctive reactions, linguistic and non-linguistic context, and mastery of a technique. This connection is explored through clarifying concepts such as "experience," "sensation," and "understanding," leading to valuable insights in aesthetics and the theory of meaning. His reflections on the logic of language and psychological concepts are interconnected, illustrated by his discussion of Moore's paradox, which highlights the limits of logical analysis and peculiarities of concepts like "believe," "assume," and "assert." This period also marks his last sustained engagement with Fregean ideas, which he had critiqued since his early writings. The content will interest philosophers, logicians, linguists, and psychologists.