The defects of Descartes lie rather in his apparently imperfect apprehension of the principle of movements uniformly accelerated which his contemporary Galileo had illustrated and insisted upon, and in the indistinctness which attaches to his views of the transmission of motion in cases of impact.
This form of laying is of two kinds: (I) that in which the gun can be layed for direction over the sight on the target itself, or on some aiming point close by, but from Indirect indistinctness or other causes quadrant elevation is preferred; and (2) that used when the target is completely laying.
This resolution or analysis into simple, because clear and distinct, elements may be brought to a standstill again and again by obscurity and indistinctness, but patient and repeated revision of all that is included in the problem should bring the analytic process to fruition.
How would you define indistinctness? Add your definition here.