Logic and Reasoning: do the facts matter?

摘要

Modern logic is undergoing a cognitive turn, side-stepping Frege's 'anti-psychologism'. Collaborations between logicians and colleagues in more empirical fieldsare growing, especially in research on reasoning and information update by intelligentagents. We place this border-crossing research in the context of long-standing contactsbetween logic and empirical facts, since pure normativity has never been a plausible stance.We also discuss what the fall of Frege's Wall means for a new agenda of logic as a theoryof rational agency, and what might then be a viable understanding of 'psychologism' as afriend rather than an enemy of logical theory.