6

11

basis of a purely ideal state of things as a premiss,
we can only reason deductively. In fact,
deduction always relates to a purely ideal
state of things, in this sense, that if the premiss
of deduction is known for anything
more than that, its being more has nothing to
do with the course of the deduction. The
Deductions which we base upon the
hypothesis which has resulted from
Abduction produce conditional predictions
concerning our future experience. That
is to say, we infer by Deduction that if the
hypothesis be true, any future phenomena
of certain descriptions must present such
and such characters. We now institute