g. the cause of our loving anything is dearer to us
than the object of our love. So since the primary premisses are the
cause of our knowledge-i.e. of our conviction-it follows that we
know them better-that is, are more convinced of them-than their
consequences, precisely because of our knowledge of the latter is
the effect of our knowledge of the premisses. Now a man cannot believe
in anything more than in the things he knows, unless he has either
actual knowledge of it or something better than actual knowledge.
But we are faced with this paradox if a student whose belief rests
on demonstration has not prior knowledge; a man must believe in
some, if not in all, of the basic truths more than in the
conclusion. Moreover, if a man sets out to acquire the scientific
knowledge that comes through demonstration, he must not only have a
better knowledge of the basic truths and a firmer conviction of them
than of the connexion which is being demonstrated: more than this,
nothing must be more certain or better known to him than these basic
truths in their character as contradicting the fundamental premisses
which lead to the opposed and erroneous conclusion.
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