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Jules Louis Cyperian Ayer, birth 1867 to:
Reine Citroen, birth 1887, daughter of Dorus Barend Citroen and Sarah Rooselaar
1) Sir Alfred Jules Ayer, birth 1910, died 1989
British philosopher known for his promotion of logical positivism, particularly in his books Language, Truth, and Logic (1936) and The Problem of Knowledge (1956).
Grace Isabel Rene Lees
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