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cal demonstration, proves the feebleness of
the human mind as a logical machine. For
it required the new point of view imagined
by Newton’s analysis to enable people to
see that, so far as planetary orbits are con-
cerned, Kepler’s three laws (B, C, D) were
identical with Newton’s law of gravitation
(A). No one recognises more than the math-
ematical astronomer this feebleness of the
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