It argues that if you lop off a portion of a circle with the line from one point of the cut to the other side of the cut in the circle being a-straight-line basically an arc-tangent-length the number points in the "lop" can be, qualitatively, discrete, infinite, or irrational.
If the circle is cut above-but-parallel-to the diameter the draw-distance of the points extracted from the cut portion will be discrete. If the circle is cut BELOW the diameter-halfway point--the line created from the number of points will have an IRRATIONAL draw-distance.
Dirac mathematics demarcates a corresponding draw-distance based on whether a circle is cut above or below the line of diameter. A cut at the diameter corresponds to an infinite draw-distance using the number of points (infinite) in the cut.
A cut above the diameter corresponds to a statistical inference; a cut AT the diameter (1/2 point) corresponds to CAUSATION.
A cut below the diameter-line corresponds to a regression--scientifically meaningless.
Dirac-ism is based on the phenomenon that cutting arc-tangent-lengths below the line of diameter produces a 2D surface with an irrational number of points. Since an infinity-number of points can only be obtained from a circle cut at the line-of-diameter: statistical regression created by the points below the half-way mark can never reach infinity.