The book reflects on Frege's theory of concepts, because Frege's theory of concepts was one strand that inaugurated analytic philosophy. Frege's theory of sentential unity has barely been superseded, and the problems arising from Frege's understanding of concepts are still alive. Frege's theory and the related problems in Frege's logic as in the Grundgesetze der Arithmetik (most famously the antinomy known as 'Russell's Paradox' going back to Frege's 'Basic Law V') lead over to considering the proper approach to our concept of logic and the issue of psychological and ontological realism in logic and mathematics.
The central part of the book starts by reconsidering the approach and the idea of ordinary language philosophy and its understanding of conceptual analysis. Although ordinary language philosophy cannot be the whole of analytic philosophy a proper understanding of conceptual analysis turns out to be one part of analytic philosophy. This part starts with a general discussion of ordinary language philosophy, but proceeds then by a methodological overview and attempts to engage in some ordinary language philosophy concerning epistemological topics.
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