n,
right behavior, and virtuous conduct not merely one among many
practical tests but the only available criterion of knowledge,
reason, and truth.  Sufficient criterion?  If a conceptual rule
is the only available test of some property, then it must be an
essential criterion of that property.  This conceives the essence
of knowledge to lie in a conception of action.   This maxim can
be taken, by way of its contrapositive, as a pragmatic principle,
positing a rule to the effect that any defect of virtue ref