‘Ve now proemd to consider the predienblom, or substitutes for the 1'mile:tides, which ranter into a purely logical system in which coutrnry terms aro admitted. [Lowe, col. 354.] The prodicables which Aristotle really uses are greens, species, and accident : and an 11A1110/1 of class, the genus and species km, terminal precision, The genus is more than the specks; the species lou than the genus. Thu accident, which belongs to some but not to all, has a definition which innile Aristotle confess that the species is an accident of the genus; (Extinguished of coins. from 'wino other nccidenta by having no oxbow(); that is, by not being the accident of anything external to the genus. According to Aristotle's use Qf the words genus and species, it species as large as the g, sus duos not exist. We have aliowtx1 the term species to be used where the genus has but one species : and we must Accordingly use other trans. Again, the really motaphymiad character of the old terms can only bo represented in our system by referring the predicablem to the logkoonetophyskof side of logic. Consequently, our predicablos must be the metaphysical notions attached to the relation. of terminal precision. [Loote, col. 350.] Though obliged to abandon the words genus awl specks, we find use for the affiectives generic and specific, which have) parted from their substantival in common language quite enough to justify the lino we make of them.
Let n predicated attribute, considered with reference to a class or to another attribute, bo inherent when the predicate always belongs to the subject; epeleolcnt, when It never belongs to the subject ; occident and tion.accident, when it belongs to part of the subject, and not to the rest, When contrary tame are introduced, the definition of occident is also that of pu'ni•icrideut: either Is the other, by mere force of definition. The inherent, the exdWent, and the accident (ton•ureident), are than the three predicable.. Each of these
predicable. may be either universal, generic, or specific.
A predicable is onirersal, with reference to the term of which It is predicates', when it belongs, in the soma sense, to both the classes into which the term divides tho unirerse. Thus in the universe animal, divided Into man and brute, life is a universal inherent, inherent both of num and brute; mineral Is a universal oxeludent, both of man and brute ; strength inn universal accident and non.accisitnt, belonging to some both of mon and brutes, and not to the rest. The universal preelleables creato no distluction, and are therefore of little or no logical force.
A predicable is generic when its quantity of applicntiDu is augmented by taking in the additional extent of some larger genus, In which the term predicated of is a speedos: specific, when this is not the case. Thus, lawyer 6 a specific «rcident ofhum ; • occident, some are and some not ; any larger ;pima of animal which contains man kw no lawyer in the additional extent. For these raucous it 6 also n generic uowaccident. The following table will now he easily ce)lected; mud the retokr of the ierticlo Louie will sea dint, just as the wools snip identical, nupeeidrntical, tito., might be dispensed with, since de/tricot species, rxient &O., Might mu poly their places, so the oxtended system of prediatblos ;night be replaced in terminology by one &rived from compounding the metaphysical relations of terminal nnibiguity. The symbols are here read forwards Tba old prolionbles, taken together, do not constitute a logical 16t 0: predicates. Their companion', the evrrootitss, are now almost uni (enmity declared to be metaphyskal, not logical. Sir W. 1lauilton, in to recently publiallel ' Lectures " on Logic,' doe. not mention the word predicable; et, least it Is not in the index, and we cannot lied it n the proper place. of the work.