human capabilities because of the nature of objects and the nature of man. The interrelation of objects, their unlimited number, and their ever-changing character prevent their being known. The limitations and variability of man's senses restrict him to knowledge of appearances, never of real substances. In forming these last argument he drew on his experience of Medicine to show how unreliable our sense experience is. Sanches' first conclusion was the usual fideistic one of the time, that truth can be gained by faith. His second conclusion was to play an important role in later thought: just because nothing can be known in an ultimate sense, we should not abandon all attempts at knowledge but should try to gain what knowledge we can, namely, limited, imperfect knowledge of some of those things with which we become acquainted through observation, experience, and judgment. The realization that nihil scitur ("nothing is known") thus can yield some constructive results. This early formulation of "constructive" or "mitigated" skepticism was to be developed into an important explication of the new science by Marin Mersenne, Pierre Gassendi, and the leaders of the Royal Society. Works Carmen de Cometa, 1577. Quod nihil scitur, 1581. De divinatione per somnum, ad Aristotelem, 1585. Opera Medica, 1636, which includes: De Longitudine et Brevitate vitae, liber In lib. Aristotelis Physiognomicon, Commentarius De Divinatione per Somnum Quod Nihil Scitur, liber Tractatus Philosophici, 1649. Translations – Latin-German. Introduction and Notes by Kaspar Howald. Translated by Damian Caluori and Kaspar Howald. Latin Text by Sergei Mariev. PhB 586. 2007. – Critical edition of Quod nihil scitur. . Sánchez, Francisco. 1991, Que nada se sabe. Introduction: Palacios, Fernando A. Spanish translation, Espasa Calpe, Madrid.ISBN 13: 9788423972357 Notes Citations References BRITO, Alberto Moreira da Rocha, Francisco Sanches, médico, professor e pedagogo. Braga: Bracara Augusta, 1952. CALUORI, Damian, 'The Scepticism of Francisco Sanchez'. Archiv für Geschichte der Philosophie 89 (2007): 30–46 . CARVALHO, Joaquim de, Introdução a Francisco Sanches, in Francisco Sanches, Opera Philosophica, Coimbra, 1955. PÉREZ, Rolando. "Francisco Sanches". Stanford Encyclopedia of Philosophy . First published March 31, 2020. PINTO, Sérgio da Silva, Braga et Francisco Sanches: discours prononcé à l'Université de Toulouse, à la séance solennele des commemorations du IVème centenaire de Francisco Sanches, le 12 Juin 1951, Braga: Cruz, 1951. PINTO, Sérgio da Silva, Francisco Sanches, português, Braga: Bracara Augusta, 1952. PINTO, Sérgio da Silva, Francisco Sanches, vida e obra, Braga 1952. SÁ, Artur Moreira