SCIENCE - BACHELARD Gaston (1884 - 1962) - Autograph letter signed Autograph letter signed, dated “Dijon le 17 Août” by the French philosopher, he introduced the concepts of epistemological obstacle and epistemological break. For Bachelard, the scientific object should be constructed and therefore different from the positivist sciences; in other words, information is in continuous construction. Empiricism and rationalism are not regarded as dualism or opposition but complementary, therefore studies of a priori and a posteriori, or in other words reason and dialectic, are part of scientific research. Addressed to Madame Bouchet, giving her an appointment in Paris for october as he is moving from Dijon to the Jura mountains. 1 p. In-8. Envelope with autograph address included. - This item is under temporary import. If the item is delivered within the United Kingdom, it will be subject to a 5% Value Added Tax (VAT) on the hammer price.