to questions of natural science. The reader will note that the
argument no longer proceeds by the simple citation of authorities pro
and con; the reasonings of the debater are also introduced. Moreover,
the argument is more complex. It involves first the statement of the
affirmative position; second, the refutation of the affirmative by
observation and by reasoning; third, objections to the refutation by
reasoning; fourth, refutation of these objections; fifth, final
refutation of the original arguments.
_Introduction_: Author's reasons for undertaking the discussion.
Let it be known to you all that, whilst I was in Mantua, a
certain Question arose, which, often argued according to
appearance rather than to truth remained undetermined.
Wherefore, since from boyhood I have ever been nurtured in love
of truth, I could not bear to leave the Question I have spoken of
undiscussed: rather I wished to demonstrate the truth concerning
it, and likewise, hating untruth as well as loving truth, to
refute contrary arguments. And lest the spleen of many, who, when
the objects of their envy are absent, are wont to fabricate lies,
should behind my back transform well-spoken words, I further
wished in these pages, traced by my own fingers, to set down the
conclusion I had reached and to sketch out, with my pen, the form
of the whole controversy.
THE QUESTION: IS WATER, OR THE SURFACE OF THE SEA, ANYWHERE
HIGHER THAN THE EARTH, OR HABITABLE DRY LAND?
AFFIRMATIVE ARGUMENT: Five affirmative arguments generally
accepted.
_Reason 1._ Geometrical Proof: Earth and Water are spheres with
different centers; the center of the Earth's sphere is the center
of the universe; consequently the surface of the Water is above
that of the Earth.
_Reason 2._ Ethical Proof: Water is a nobler element than Earth;
hence it deserves a nobler, or higher, place in the scheme of the
universe.
_Reason 3._ Experimental Proof: based on sailors seeing the land
disappear under their horizon when at sea.
_Reason 4._ Economical Proof: The supply of Water, namely, the
sea, must be higher than the Earth; otherwise, as Water flows
downwards, it could not reach, as it does, the fountains, lakes,
etc.
_Reason 5._ Astronomical Proof: Since Water follows the moon's
course, its sphere must be
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