1905 births 1997 deaths 20th-century essayists 20th-century German male writers 20th-century German non-fiction writers 20th-century German philosophers City College of New York faculty Empiricists German essayists German logicians German male essayists German male non-fiction writers Academic staff of the Hebrew University of Jerusalem Heidelberg University alumni Humboldt University of Berlin alumni Logical positivism People from Oranienburg People from the Province of Brandenburg Philosophers of logic Philosophers of mathematics Philosophers of science Philosophy academics Philosophy writers Princeton University faculty University of Göttingen alumni University of Pittsburgh faculty Vienna Circle Yale University faculty Corresponding Fellows of the British Academy