Kitap 3
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The first difficulty is concerned with the subjectsThe principles and causes referred to in Book I. which we discussed in our prefatory remarks. (1.) Does the study of the causes belong to one science or to more than one?The problem is discussed Aristot. Met. 3.2.1-10, and answered Aristot. Met. 4.1.(2.) Has that science only to contemplate the first principles of substance, or is it also concerned with the principles which all use for demonstration—e.g. whether it is possible at the same time to assert and deny one and the same thing, and other similar principles?Discussed Aristot. Met. 3.2.10-15; answered Aristot. Met. 4.2.
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And if it is concerned with substance, (3.) is there one science which deals with all substances, or more than one; and if more than one, are they all cognate, or should we call some of them kinds of Wisdom and others something different?Discussed Aristot. Met. 3.2.15-17; answered Aristot. Met. 4.2.9-10, Aristot. Met. 6.1.
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This too is a question which demands inquiry: (iv.) should we hold that only sensible substances exist, or that there are other besides? And should we hold that there is only one class of non-sensible substances, or more than one (as do those who posit the Forms and the mathematical objects as intermediate between the Forms and sensible things)?Discussed Aristot. Met. 3.2.20-30 answered Aristot. Met. 12.6-10, and also by the refutation of the Platonic Ideas and Intermediates in Books 13 and 14.
