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Kazimierz Ajdukiewicz
Polish philosopher and logician (1890-1963).
Born December 12th, 1890 in Ternopil. [ref]
Died April 12th, 1963 at 72 years old in Warsaw. [ref]
Occupations
mathematician, pedagogue, philosopher, translator, university teacher
Wikipedia
The great thing about getting older is that you don't lose all the other ages you've been. Madeleine L'Engle