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Jean Piaget

Swiss psychologist, biologist, logician, philosopher and academic (1896-1980).

Born August 9th, 1896 in Neuchâtel. [ref]

Died September 16th, 1980 at 84 years old in Geneva. [ref]

Occupations
biologist, logician, malacologist, pedagogue, philosopher, psychologist, university teacher, zoologist
Wikipedia

There is still no cure for the common birthday. John Glenn