The like is true of the other sciences. There
is a limit, then, to the questions which we may put to each man of
science; nor is each man of science bound to answer all inquiries on
each several subject, but only such as fall within the defined field
of his own science. If, then, in controversy with a geometer qua
geometer the disputant confines himself to geometry and proves
anything from geometrical premisses, he is clearly to be applauded; if
he goes outside these he will be at fault, and obviously cannot even
refute the geometer except accidentally. One should therefore not
discuss geometry among those who are not geometers, for in such a
company an unsound argument will pass unnoticed. This is
correspondingly true in the other sciences.
Since there are 'geometrical' questions, does it follow that there
are also distinctively 'ungeometrical' questions? Further, in each
special science-geometry for instance-what kind of error is it that
may vitiate questions, and yet not exclude them from that science?
Again, is the erroneous conclusion one constructed from premisses
opposite to the true premisses, or is it formal fallacy though drawn
from geometrical premisses? Or, perhaps, the erroneous conclusion is
due to the drawing of premisses from another science; e.
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