Subdivision is a relevant factor in properly isolating the negative stimuli.
Positive stimuli, on the other hand, is allowed to flood the mind unconsciously. Assumptions form the conscious limit of this flooding, only recognized once removed, ie. negated. Unchecked, flooding continues to the point that sensory overload occurs. Satisfactions are less frequently negatable and vary from the directly biological to the purely arbitrary. Consciously, they may be true, unconsciously, they are not.