Central topics pertaining to the current debate in the philosophy of action concern the distinction between practical and theoretical reasoning, and the nature of a conclusion in a process of reasoning. In this debate the reference to the Aristotelian reflection is recurrent. In four passages from his works, that is MA. 7, 701a7-b1, EN. H 5, 1147a24-31, EE. B 11, 1227b23-33 and EN. Г 5, 1112bl1-24, Aristotle explores some important aspects of practical reasoning making a parallel with the logical structures (...) of theoretical reasoning. In particular he finds specific analogies between practical and theoretical syllogism, practical and theoretical necessity, deliberation and analysis, action and demonstration. In spite of its specifications, the activity of reason shows its unity. Aristotle considers and deepens the constitutive ingredients of theoretical reasoning in the contest of practical philosophy. The comparison between practical and theoretical reasoning has consequently an expositive purpose, because it supports Aristotle's treatment of action theory. (shrink)

This paper explores Aristotle's remarks in Posterior Analytics on certain special disciplines that are subordinate to pure mathematical sciences. Optics, harmonics and mechanics prove their own contents by means of premises belonging to arithmetic or geometry. Even though subaltern sciences are exceptions to the prohibition on kind crossing, the premises to their demonstrations are legitimately appropriate to the relative conclusions. In order to delineate the demonstrative structure of subordinate sciences, Aristotle introduces the distinction between knowledge of a fact and knowledge (...) of the reason for it. In his view, these two different levels of knowledge, characterizing respectively empirical and theoretical approaches, are closely related. Nautical astronomy, for instance, deals with the observation and recording of the astral motions, which are made intelligible by mathematical astronomy. The Aristotelian ideal of an explanatory connection between appearances and mathematical principles seems to be the main aspect in the treatment of subordinate sciences in Posterior Analytics. (shrink)