Analytic  does not equal  synthetic
               Semantic  does not equal  Syntactic
         Direct product  does not equal  direct Sum
   external description  does not equal  internal description
            fabrication  does not equal  physiology
and
A complex system contains a non-simulable model (something that
cant be done on a computer)...
A complex system is non-fractionable
Complex systems contain impredicativities (self-references)... It can't
be defined without referring to itself...
There is no (mechanistic) largest model (that explains everything)
The categories of causation in it cannot be segregated into discrete,
fixed parts, because fractionability itself fails.
No state set built up synthetically from the states of minimal models.
This takes us out of dynamical system's theory...
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Of course, now, to understand these definitions, one has to understand
these concepts (referred to by these terms)...
One hint on a possible strategy to find a realization...Rosen implies that
complex systems may interact with different observables than we measure.  Even
though we may not be able to directly perceive these observables, we may be able
to know under what circumstances these different observables exist...and then
put certain appropriate subsystems together so that they can interact using
these observables...  If these subsystems then interact in a way that is
substantially different than anything our dynamical system's equations can
predict, then we MAY have a complex realization.
Of course, the reductionists would then just call this a new force and go on
their merry way...It would then be interesting if a Godel-like theorem (for the
physical world) could be developed that showed that a new complex system
(interacting with new observables) could be developed for each "new force" added
to the reductionist repertoire.