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3A Study on Gradation in Mirfendereski\'s Philosophy with a Glance on Avicenna and Sohravardi\'s IdeasMetaphysics (University of Isfahan) 4 (13): 45-60. 2012.The problem of gradation in being is one of the fundamental debates in philosophy. Some Muslim philosophers have accepted the gradation and some have denied it. By comparing the ideas of Muslim thinkers, the present article tries to examine Mirfendereski’s peculiar idea on this issue and by presenting valid arguments, it proves that, in spite of common opinions about him, he believed in gradation in being.