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Wittgenstein terminó la primera parte de las INVESTIGACIONES FILOSOFICAS en la primavera de 1945. Un año después comenzó a trabajar en la filosofía de la psicología, en la cual se concentró, prácticamente sin interrupción, durante tres años. La presente obra, editada en dos volúmenes, abarca muchos de sus escritos de este periodo. Una característica importante de las OBSERVACIONES SOBRE LA FILOSOFÍA DE LA PSICOLOGÍA es la nueva luz que arroja sobre la segunda parte de las INVESTIGACIONES, además de mostrar un marcado énfasis en el aspecto "antropológico" y en la descripción de las cualidades características de nuestra constitución cognoscitiva y de la percepción. Estas observaciones, por consiguiente, serán de gran interés no sólo para los filósofos, sino también para los antropólogos, los psicólogos y los sociólogos. G.E.M. Anscombe y G.H. von Wright son los editores de los dos volúmenes, que se presentan en edición bilingüe.
Ludwig Wittgenstein
Nació en Viena en 1889 en el seno de una familia ilustrada. Ludwig fue un jóven sensible, con inteligencia extraordinaria y talentos musicales, pero sin ningún interés en el mundo de los negocios. Cursó estudios en Linz y Berlín, posteriormente viaja a Gran Bretaña para estudiar ingeniería en la Universidad de Manchester. Muy interesado por las matemáticas puras entra en el Trinity College (Cambridge)para estudiar con Bertrand Russell. Al estallar la primera guerra mundial, se alista en el ejército Austro-Húngaro como soldado raso. Fue capturado por los Italianos en las semanas finales de la guerra, y pasó casi dos años en un campamento de prisioneros en Italia. Falleció en Cambridge en 1951.
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