# The Computational Metaphor Distorts How We Understand the Brain by Rodney A. Brooks > “By the sixties, cyberneticians were using models of negative feedback originally developed for the steam engine, and greatly expanded upon during the war of the forties for controlling the aiming of guns, to try develop models for the brain. But these soon ran out of steam, so to speak, and were supplanted in the general consciousness by metaphors of the brain as a digital computer. One started to hear claims of the brain as the hardware, and the mind as the software, a model that really did not end up helping our understanding of either the brain or the mind very much at all. Throughout the later parts of the twentieth century the brain became a massively parallel digital supercomputer, and now one can find claims that the brain and the world wide web are similar in how they work with webpages and neurons playing similar roles, while hyperlinks and synapses map to each other.” > **— Rodney A. Brooks**, *2014, Edge Annual Question, “What Scientific Idea Is Ready For Retirement?”* ## Sources and Context - **Direct Edge response and surrounding essay:** [The Computational Metaphor](https://www.edge.org/response-detail/25336) — Edge published this exact passage in its 2014 Annual Question collection, *WHAT SCIENTIFIC IDEA IS READY FOR RETIREMENT?*. The response page preserves the surrounding argument and qualifications. - **Complete local collection index:** [[research/Edge 2014 Full Quotation Curation|Edge 2014 Full Quotation Curation]] — retained source-first record for the complete response cohort and this passage's promotion status. ## Related Articles and Collections - **Collection:** [[collections/Edge|Edge]] - **Collection:** [[collections/Machine Succession|Machine Succession]] - **Article:** [[articles/The Evolutionary Roots of Silicon Valley|Valley Roots]] - **Article:** [[articles/Modern Artificial Intelligence in the 1970s|AI in the 1970s]] - **Article:** [[articles/Cyber-Physical Lessons from Imperial Beekeeping|Cyber-Physical Beekeeping]] - **Article:** [[articles/STEVE|STEVE]] - **Wiki map:** [[wiki/Cybernetics|Cybernetics]] ## Related Topics - [[wiki/Cybernetics|Cybernetics]] - [[wiki/Cybernetic Feedback Loop|Cybernetic Feedback Loop]] - [[wiki/Philosophy of Mind|Philosophy of Mind]] - [[wiki/Connectionism|Connectionism]] ## Share on Social Media ``` “By the sixties, cyberneticians were using models of negative feedback originally developed for the steam engine, and greatly expanded upon during the war of the forties for controlling the aiming of guns, to try develop models for the brain. But these soon ran out of steam, so to speak, and were supplanted in the general consciousness by metaphors of the brain as a digital computer. One started to hear claims of the brain as the hardware, and the mind as the software, a model that really did not end up helping our understanding of either the brain or the mind very much at all. Throughout the later parts of the twentieth century the brain became a massively parallel digital supercomputer, and now one can find claims that the brain and the world wide web are similar in how they work with webpages and neurons playing similar roles, while hyperlinks and synapses map to each other.” — Rodney A. Brooks, 2014, Edge Annual Question, “What Scientific Idea Is Ready For Retirement?” https://bryantmcgill.com/simple-reminders-rodney-brooks-computational-metaphor-distorts-understand-brain ```