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One can therefore say: in perception, sensory signals call up a concept, in re-presentation, on the other hand, a concept calls up sensory impressions. In neither case is the experience caused by what philosophers want to call “reality”. +
so, to have survived does not tell the biological organisms anything about the constraints they have not met, i.e., the constraints that eliminated those that could not survive. +
According to the neurophysiologist’s model of the nervous system, it therefore appears that the discrimination of sensory modalities—seeing, hearing, touching, etc.—must be the result of the system’s own computation. From this perspective, then, whatever sensory structures, patterns, or images a living system compiles are its own construction, and the notion that they represent something that was there beforehand, has no empirical foundation. +
You may, for example, dream that you are in a room, but all you see of the room is a door (perhaps because you expect someone to come in through it). You have no idea of the size of the room, and there are no windows, curtains, pictures, no ceiling or furniture, or anything else that usually characterizes a room. These items may come in later—as the plot of the dream develops— but at this point, they are irrelevant in your dream-presentation of a room. In contrast, your perception of a room starts from sensory impressions that you proceed to coordinate, and they then allow you to consider them compatible with your concept of “room”. +
The argument that our concepts, which we abstract from experience, cannot grasp anything that lies beyond our experiential interface, applies not only to the divine but also to any ontological reality posited as independent of the human experiencer. +
Compatibility, to repeat it once more, means no more and no less than to fit within constraints. Consequently, it seems to me that one of the most demanding tasks of A.I. would be the plausible simulation of an organism’s experience of social constraints +
We can visualize it with the help of a metaphor: the environment “selects” in the manner of a screen used to grade gravel: the screen admits what falls through and discards what does not. +
This principle is, indeed, universal. If there is something we would like to create or have, we look for some specific event or action to which experience has tied the desired item as ‘effect’. If we find it, we try to implement its causal function, hoping that it will produce what we wanted. +
To my mind, this illustrates what is perhaps the most valuable feature of the cybernetical analysis of phenomena in general, and of 2nd-order Cybernetics in particular. It leads us to think in terms, not of single causes and effects, but rather of equilibria between constraints. This helps to avoid the widespread illusion that we could gather “information” concerning a reality supposed to be causing our experience; and it therefore focuses attention on managing in the experiential world we do get to know. +
The good old thermostat, the favorite example in the early literature of cybernetics, is still a useful explanatory tool. In it a temperature is set as the goal-state the user desires for the room. The thermostat knows nothing of the room or of desirable temperatures. It is designed to eliminate any discrepancy between a set reference value and the feedback it receives from its sensory organ, namely the value indicated by its thermometer. If the sensed value is too low, it switches on the heater, if it is too high, it switches on the cooling system. Employing Gordon Pask’s clever distinction (Pask, 1969, p.23–24): from the user’s point of view, the thermostat has a purpose for, i.e. to maintain a desired temperature, whereas the purpose in the device is to eliminate a difference. +
If we have never formulated a tentative rule of the kind “all roses I have seen, smelled sweet,” we would not be tempted to say: “this flower looks like a rose— therefore it will smell sweet.” In other words, if we have had no success with inductive inferences, we are unlikely to proceed to deductive ones. +
Consequently there is no past experience of steps that led towards it or actions that brought it about. There are no abstracted cause-effect relations that one could try to implement to reach an unfathomable end. In short, even for those who believe that knowledge does not pertain to anything beyond the realm of experience, a cause that lies outside has no explanatory power. +
Definitions set conditions which the abstract form we call concept must satisfy, and it is the same conditions that some experiential material must fit in order to be accepted as a proper instantiation of the concept. +
Prediction, in one form or another, permeates our living, and the expectation that the efficient causes we have isolated in the past will have their effects also in the future, is the key to whatever success we have in managing our experience. +
Prescriptive purposes, therefore, are there prior to their embodiment, which then has the particular purpose in it. +
Though the sequential frames that compose the concept of efficient cause are obviously abstracted from prior experience and therefore lie in the past, they can, and often are, projected as predictions into areas that have not yet been actually experienced. +
Hence, it was unfortunate, to say the least, that the term teleological was indiscriminately applied to the explanation of actions that are in no way determined by something that lies in the future, something that still awaits to be experienced. +
Hence it is quite legitimate to call the attainment and maintainment of the projected state the purpose in the mechanism. +
That is to say, neither of these two basic elements in the construction of our experiential world is conceivable unless we segment experience into separate discrete frames and then focus attention on similarities or differences between the segments. +
Where evolution is concerned, then, there is no harm in using ‘purpose of’ as a descriptive tool, provided one does not mistake it for the purpose for, which would imply a guiding outside force that intentionally designed the thing one is describing. +
