2. Dictum de Excepto—
If a certain attribute can be denied of any portion of the members of a class, it is not inseparable from the distinctive attributes of that class.
CHAPTER XVI.
Of the Special Uses of the Four Figures.
§ 648. The first figure is useful for proving the properties of a thing.
§ 649. The second figure is useful for proving distinctions between things.
§ 650. The third figure is useful for proving instances or exceptions.
§ 651. The fourth figure is useful for proving the species of a genus.
FIGURE 1.
§ 652.