No More Learning

The forms of reasoning have no
result, excepting when they are applied to
our judgment of external objects, and in
this           they are liable to error;
but they are not the less necessary in them-
selves ;--that is to say, we cannot depart
from them in any of our thoughts: it is
impossible for us to figure any thing out of
the sphere of the relations of causes and
effects, of possibility, quantity, &c.