the threshold of the element's sensitivity to the external influence and that the element is capable to respond to the given influence in general. If the element is able of reacting to pressure above 1 atmosphere it will necessarily react if the pressure is in excess of 1 atmosphere. If the pressure is less than 1 atmosphere it will not react to the lower pressure. If it is influenced by temperature, humidity or electric induction, it will also not react, howsoever we try to "persuade" it, as it is only capable to react to pressure higher than 1 atmosphere. In no pressure case (no pressure above 1 atmosphere), it will never react. Since the result of the system's performance appears only following some external influence, it is always secondary, because the external influence is primary. External influence is the cause and the result of action is a consequence (Function). It is obvious that donor systems can produce one or several results of action, while the recipient systems may only react to one or several external influences. But donor elements can interact with the recipient systems only in case of qualitatively homogeneous actions. If the recipient systems can react only to pressure, then the systems able of interacting with them may be those which result of action is pressure, but not temperature, electric current or something else. Interaction between donor systems and recipient systems is only possible in case of qualitative uniformity (homoreactivity, the principle of homogeneous interactivity). We can listen to the performance of the musician on a stage first of all because we have ears. The earthworm is not able to understand our delight from the performance of the musician at least for the reason that it has no ears, it cannot perceive a sound and it has no idea about a sound even if (hypothetically) it could have an intelligence equal to ours. The result of action of the recipient element can be both homogeneous (homoreactive) and non-homogeneous, unequal in terms of quality of action (heteroreactive) of external influence in respect of it. For example, the element reacts to pressure, and its result of action can be either pressure or temperature, or frequency, or a stream/flow of something, or the number of inhabitants of the forest (apartment, city, country) etc. Hence, the reaction of an element to the external influence can be both homoreactive and heteroreactive. In the first case the elements are the action transmitters, in the second case they are converters of quality of action. If the result of the system's actions completely corresponds to the implementation of goal, it speaks of the sufficiency of this system (the given group of interacting elements) for the given purpose. If not, the given group of elements mismatches the given goal/purpose and/or is insufficient, or is not the proper system for the achievement of a degree of quality and quantity of the preset goal. Therefore, any existing ob...
