“Theory of Categories As Based on the Principle of Acquaintance: A Critique of Jorge J. E. Gracia’s Metaphysical Neutralism”. Pensamiento. Revista de Investigación e Información Filosófica 65, no. 246 S.Esp (February 9, 2015): 1123–1131. Accessed December 5, 2025. https://revistas.comillas.edu/pensamiento/article/view/4850.