| of the middle term to the natural
| shrewdness of the mind or to good
| fortune. Thus, it is because of its
| own demonstrative form that the
| syllogism is unable to provide a
| method of truth and is useless for
| science.
|
| By now it is clear why the old logic
| and the knowledge which is built on it
| are unable to produce works or why the
| extant works "are due to chance and
| experience rather than to sciences"
| (IV, 48). To deduce practical effects,
| the mind must know real causes or laws
| of nature. Since the old method does
| not supply the mind with the means of
| inventing causes and does not set up
| the scale of the intermediate
| propositions that are needed to reduce
| sensible experience and reach the real
| science, or to derive rightly and by
| degrees the consequences from the
| principles, it is not surprising that
| invented works are too few and not
| very useful for men's lives. Thus,
| from the start in sensible experience
| to the end in practical deduction,
| this old method is of no use. And an
| entirely new one must be proposed,