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C00002 00002	ON MOTIVATIONAL STRUCTURES - ESPECIALLY HUMAN
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ON MOTIVATIONAL STRUCTURES - ESPECIALLY HUMAN


	While the belief structures of machines are similar to
those of humans, because they are determined by function, the
motivational structure of humans is quite different from any that
we would be likely to put in a machine except for the explicit
purpose of simulating a human.  One might wonder why this is so,
since one might expect the motivational structure to have been
subject to selection pressure just as the intellectual structure
has been.  Well, apparently it is being subject to selection
pressure, and many variants of human motivational structure
are being deselected by failure to reproduce.

	We begin by considering machine motivational structures:

	#. The best understood is the simple servo-mechanism.  A
certain function measures the deviation of the present state of
the system from a desired state, and generalized forces are applied
to the co-ordinates of the state in such direction as will reduce
the deviation.  A common elaboration is the multi-loop system in
which the behaviors of parts of the system are controlled by
separate servo loops.  The most common malfunctions of such systems
involve instabilities caused by time lags the wrong amount of gain
or the wrong amount of damping.  The human contains a number of
such servomechanisms, but the overall motivational structure does
not have this form.  I am somewhat doubtful whether terms like
%2wanting%1 can usefully be applied to servo-mechanisms.

	#. The second mechanism is a tree search problem solver