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Showing posts from December, 2025

The Enigma of Reason: Rethinking Cognition as Social Adaptation

How Mercier and Sperber reframe reasoning as justification and argumentation in human interaction. Overview Mercier and Sperber’s The Enigma of Reason challenges one of the most entrenched assumptions in cognitive science: that reason evolved primarily to improve individual knowledge and decision-making. Instead, they argue that reason is best understood as a social adaptation, designed to justify our actions and persuade others. This reframing positions reason not as a solitary truth-seeking faculty, but as a tool for navigating the complexities of human cooperation and communication. Previous works such as Kahneman’s Thinking, Fast and Slow (2011), building on his collaboration with Amos Tversky, summarized decades of research revealing flaws in reasoning. Much of human decision-making relies on mental shortcuts or heuristics, characteristic of System 1 thinking, which depend in part on intuitions shaped by regularities in nature. Kahneman emphasized the slow and effortful work of Sy...