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[ARNAULD, ANTOINE; and NICOLE, PIERRE.] La Logique; ou, L'Art de Penser. 473, [7] pages, including errata/license leaf at end. 12mo, 150x89 mm, contemporary calf gilt, spine ends chipped, joints starting, cords intact; contents toned, light dampstain in upper outer corners toward beginning and at end, scattered rust spots, burn hole through S11-T1 restored with text supplied in manuscript. Paris: Jean Guignart et al., 1662
first edition. The manual of logic co-authored by Arnauld and Nicole, "developed from Descartes's Regulae, elaborates the theory of 'clear and distinct' ideas and gives the first account of Pascal's Méthode. It had enormous influence as a textbook until comparatively recent times" (DSB). It became known as the Port-Royal Logic because of the authors' association with the Jansenist Convent of Port-Royal. DSB I, 292.
