%0 Journal Article %T Algumas observa es sobre a no o aristot¨¦lica de prioridade em natureza e em substancia %A Michail Peramatzis %J DoisPontos %D 2010 %I Universidade Federal do Paran¨¢, Universidade Federal de S?o Carlos %X Aristotle¡¯s notion of priority in nature and in substance, as introduced in Metaphysics 1019a2-4, has been traditionally understood in terms of priority in existence: x is prior to y if x can exist without y¡¯s existing, but y cannot exist without x¡¯s existing. In this paper I challenge this traditional view. I argue for an alternative view in terms of priority in being, which is ontological counterpart of definitional priority. According to priority in being, x is prior to y if x can be what it is without y¡¯s being what it is, whereas y cannot be what it is without x¡¯s being what it is. %K Priority %K Ontology %K Essentialism %K Substance %K Modality %K Definition %U http://ojs.c3sl.ufpr.br/ojs2/index.php/doispontos/article/view/14820/11754