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C00002 00002	%flipfl[f88,jmc]		The flipflop (flip-flop) as an example
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%flipfl[f88,jmc]		The flipflop (flip-flop) as an example

	Theories of intention are usually partial theories in an
essential way.  They only predict what an intentional
system will do when their conditions of applicability are satisfied.
In this they differ from the paradigmatic scientific theories of
physics, such as Newtonian mechanics which predicts how a mass
particle will respond when the force is an arbitrary function of
time.  This is not only a property of intentional systems, although
they provide the best examples.  In order to show that there is
nothing mysterious about partial theories, we consider the theory
of the D flipflop, a basic building block of digital circuits.

	The D flipflop as shown in figure 1 has three inputs and
three outputs.  The values of the inputs and outputs are nominally
two voltages corresponding to the Boolean values 0 and 1.  Of course,
the actual voltages will differ from the nominal voltages and
will fluctuate.  They will also make transitions from the 0 value
to the 1 value and vice versa.  However, if the circuit is properly
operated, the voltages will stay close enough to the nominal nominal
values except when a transition is taking place.

  The middle input is called the clock input.