72

G72

Philodemus, under whose instruction Cicero studied;
and the theory of Philodemus, like that of Mill, is that this kind of
reasoning (the only valid reasoning in his opinion,) derives its validity
from the existence in nature of special uniformities. Only the uniformities
that attracted the attention of Philodemus, instead of being
unif characterizing certain classes, characterize certain characters,
and consist in their having a special tendency to be present (or to be
absent) throughout all the members of certain kinds of classes. In
fact, still other types of uniformities may affect the strength of