Handbook of the History of Logic: - Fordham University Faculty

The Assimilation of Aristotelian and Arabic Logic up to the Later Thirteenth Century 335
Maximal proposition: That whose use is good, is itself also
good.
(15) Differentia: From associated accidents.
Maximal proposition: If the secondary of associated accidents
inheres, so does the primary.
III. Extrinsic loci.
(16) Differentia: From an authoritative statement.
Maximal proposition: Any expert ought to be believed within
his science.
(17) Differentia: From a similar thing.
Maximal proposition: The same estimation obtains about
similar things.
(18) Differentia: From the more.
Maximal proposition: If what seems the more to inhere does
not inhere, neither will that which seems the less.
(19) Differentia: From the less.
Maximal proposition: If what seems the less to inhere inheres,
then will also that which seems the more.
(20) Differentia: From proportion.
Maximal proposition: The same estimation obtains about
proportional things.
(21) Differentia: From contraries.
Maximal proposition: If one of the contraries is ascribed to
something, the other is denied of the same thing.
(22) Differentia: From privative opposites.
Maximal proposition: If one of the privative opposites is ascribed
to something, the other is denied of the same thing.
(23) Differentia: From relative opposites.
Maximal proposition: If one of correlated things is posited,
the other is posited.
(24) Differentia: From contradictory opposites.
Maximal proposition: If one of the contradictory opposites
is true, the other is false, and vice versa.
(25) Differentia: From transumption.
Maximal proposition: What belongs to something under a
more well-known name, also belongs to it under a less wellknown
name.
IV. Intermediate loci.
(26) Differentia: From inflection.
Maximal proposition: What belongs to one inflected form,
also belongs to the other.
(27) Differentia: From coordinates.