Crítica, Revista Hispanoamericana de Filosofía, Volume 35, number 104, agosto 2003
Acerca de las parejas incongruentes y las figuras simétricas
[On Incongruent Couples and Symetric Figures]
Carlos Álvarez
Facultad de Ciencias
Universidad Nacional Autónoma de México

Abstract: The question concerning the incongruent counterparts is raised by Kant in 1768, but it is also discussed later in 1770 and 1783. This question, which is related to his conception about the nature of space, is also closely related to his ideas about the nature of geometric knowledge. My aim in this paper is to analyze Kant's remarks on this topic —three of these remarks seem particularly relevant to us— in view of Euclidean solid geometry, which constitutes precisely the theoretic and scientific frame where he pretended they should fit.
Keywords: congruence, equality, solid angle, geometric knowledge

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