sentences:  And one with knowledge of that domain, is one adapted to that domain, for they can tweak the problems, the entities and the procedures within the certain domain.Cognition emerges as a consequence of continuous interaction between the system and its environment.The continuous interaction triggers bilateral perturbations; perturbations are considered problems – therefore the system uses its functional differentiation procedures to come up with a solution (if it doesn't have one handy already through its memory).