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[343a] and for this reason, no man of intelligence will ever venture to commit to it the concepts of his reason, especially when it is unalterable—as is the case with what is formulated in writing.But here again you must learn further the meaning of this last statement. Every one of the circles which are drawn in geometric exercises or are turned by the lathe is full of what is opposite to the fifth, since it is in contact with the straight everywhere1; whereas the circle itself, as we affirm, contains within itself no share greater or less of the opposite nature. And none of the objects, we affirm, has any fixed name,
1 i.e. any number of straight tangents to a circle may be drawn; or, a circle, like a straight line, is composed of points, therefore the circular is full of the elements of the straight.