"Avicenna (Ibn Sina): Logic" "Avicenna (Ibn Sina): Logic" „Avicenna (Ibn Sina): Logic” Avicenna (Ibn Sina): Logic Avicenna (Ibn Sina): Logic http://www.iep.utm.edu/av-logic www.iep.utm.edu/av-logic/ "Avicenna (Ibn Sina): Logic" "Avicenna (Ibn Sina): Logic" Avicenna (Ibn Sina): Logic "Avicenna (Ibn Sina): Logic"