The Knowledge Illusion

Résumé du livre

Steven Sloman, a professor of cognitive linguistics, teaches at Brown University. He is also the editor of Cognition, a scientific journal dedicated to the study of cognitive science.

During the 1960s and 1970s, cognitive scientists likened the brain to a biological computer, a view influenced by concurrent advancements in computing and cognitive science. This analogy, rooted in Alan Turing’s ideas, was challenged in the 1980s by Thomas Landauer, who quantified human knowledge in computational terms, estimating it at roughly one gigabyte. His findings revealed that the brain’s primary function is not data storage but something more adaptive, as the complexity of the world far exceeds what any individual can comprehend. This insight raises questions about the brain’s evolutionary purpose, which seems tied to action and reasoning. Humans uniquely excel at diagnostic reasoning—tracing effects back to causes—a skill that has been pivotal for survival, scientific discovery, and storytelling, the latter enabling us to understand and shape our world. The evolution of brains, driven by the need for action, distinguishes humans from other species through our capacity for causal reasoning and collaboration. This collaborative ability, rooted in shared intentionality and the division of cognitive labor, has enabled humanity to achieve extraordinary feats, from building homes to exploring space. However, our reliance on intuition often leads to overconfidence in our understanding, as seen in the illusion of explanatory depth. This cognitive gap highlights the importance of humility and collective thinking. Similarly, our interactions with technology, which we often anthropomorphize, reveal both its utility and its limitations, as machines lack the shared intentionality that defines human intelligence. While fears about advancements like superintelligence or GMOs persist, they often stem from flawed causal reasoning and a lack of understanding. Addressing these misconceptions requires acknowledging the limits of intuition and embracing education, collaboration, and critical thinking as tools for progress.

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