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Born in Oranienburg, GE
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He and Rudolf Carnap began participating with the Berlin Circle
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Received degree from the University of Berlin with a dissertation on probability theory " Contributions to the Logical Analysis of the Concept of Probability"
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Moved to Belgium due to the anti-Semitic Nazi because of his wife's Jewish ancestry
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The two co-authored the book Der Typusbegriff im Lichte der neuen Logik on typology and logic
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Moved to the USA where he worked as Rudolf Carnap's assistant at the University of Chicago
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He sadly died at the age of 92 in Princeton, NJ
