 Position (4),  a form of representative  realism,[14]  accounts for the perceptual relativity that makes us want to distinguish the immediate object of perception from the properties we ascribe to physical objects (Perceptual Variation). The immediate object is elliptical; the penny, round. Although accommodating relativity, this position may be challenged for making it difficult to know the properties of the physical object, for the object is once removed from perception. But Moore (1913–14: 379–380) was not swayed by this challenge, generally aligning himself with common sense beliefs about physical objects.