BOOK I PART III
are entirely free from doubt and uncertainty.
By probability, that evidence, which is still at-
tended with uncertainty. It is this last species
of reasoning, I proceed to examine.
Probability or reasoning from conjecture
may be divided into two kinds, viz. that which
is founded on chance, and that which arises
from causes. We shall consider each of these
in order.
The idea of cause and effect is derived from
experience, which presenting us with certain
objects constantly conjoined with each other,
produces such a habit of surveying them in that
relation, that we cannot without a sensible vi-
olence survey them iii any other. On the other
hand, as chance is nothing real in itself, and,
properly speaking, is merely the negation of
a cause, its influence on the mind is contrary