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G. Spencer-Brown, English mathematician, psychologist, and author (died 2016)
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G. Spencer-Brown
English Mathematician (1923-2016)
George Spencer-Brown was an English polymath best known as the author of the 1969 book Laws of Form, a study of mathematics and philosophy. He described himself as a "mathematician, consulting engineer, psychologist, educational consultant and practitioner, consulting…Source: Wikipedia (CC BY-SA)