Two alternative expressions of the same thing. It is the same circle conceived under two different "attributes." Both the identical individual. This here chicken distinguished from all other ones. Go back, find the elements out of which the egg is made up, the material of the egg, its from What. You find the hen and her reproduction system, the cock and his. The agents that generated the egg, we still do not understand what an egg really is, unless we recognize the egg as a possible chicken. So, which comes first, obviously the chicken comes first in understanding eggs, the chicken that is to be.