Kitap 5
10.60
What is not a property will be a difference: it is, for instance, one thing to be a slave, and another to be in a state of servitude; hence the distinction raised in connexion with persons assigned to their creditors for debt: A slave, if he is manumitted becomes a freedman, but this is not the case with one who is assigned. There are also other points of difference which are dealt with elsewhere. VII. iii. 26. Also III vi. 25.
10.61
Again, the term difference is applied in cases when the genus is divided into species and one species is subdivided. Animal, for instance, is a genus, mortal a species, while terrestrial or biped is a difference: for they are not actually properties, but serve to show the difference between such animals and quadrupeds or creatures of the sea. This distinction, however, comes under the province not so much of argument as of exact definition. Cicero Cic. Top. iii. 13. separates genus and species,
