Domain
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A set of actions is referred to as a domain. Theories (models
of the world) we construct are never universal. They are always applicable
to some part of the reality only. This part is the domain of the theory.
When we apply a theory, we assume that only those actions take place
which are within the domain. Make an action which is not included
in the domain, and the whole theory may become out of place.
The states of the world are defined as subsets of the domain of the theory.
Other actions are ignored; they may be either irrelevant, when they
have no impact on the legitimacy of the theory, or prohibited, when
they make the theory unapplicable.
Copyright© 1991 Principia Cybernetica -
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