If the Duchamp urinal is art, then anything is. But there has to be consensus about good art among informed people -- artists, dealers, curators, collectors. Somebody has to be the first to say something is good, but if you put it up the flagpole and nobody salutes it, then there's nothing there. WILLIAM RUBIN
Conventional eight groove rifling on the left, and octagonal rifling on the right. Polygonal rifling /pÉËlÉªÉ¡ÉnÉl/ is a type of gun barrel rifling where the traditional lands and grooves are replaced by hills and valleys in a rounded polygonal pattern, usually taking the form of a hexagon or octagon.n the Glock pistol, for instance, octagonal rifling is used in the large diameter .45 ACP bore, which has an 11.23 mm (0.442 in) diameter, since it resembles a circle more closely than the hexagonal rifling used in smaller diameter bores.
A diagonal lashing is a type of lashing used to bind spars or poles together applied so that the lashings cross over the poles at an angle. In association football, the diagonal system of control is the method referees and assistant referees use to position themselves in one of the four quadrants of the pitch.s applied to a polygon, a diagonal is a line segment joining any two non-consecutive vertices. Therefore, a quadrilateral has two diagonals, joining opposite pairs of vertices. For any convex polygon, all the diagonals are inside the polygon, but for re-entrant polygons, some diagonals are outside of the polygon.