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Sigma KEE - hasPurposeForAgent
has purpose for agent
Expresses a cognitive attitude of an agent with respect to a particular instance of Physical. More precisely, (
?THING ?FORMULA ?AGENT) means that the purpose of ?THING for ?AGENT is the proposition expressed by ?FORMULA. Very complex issues are involved here. In particular, the rules of inference of the first order predicate calculus are not truth-preserving for the second argument position of this
Properties or qualities as distinguished from any particular embodiment of the properties/qualities in a physical medium. Instances of Abstract can be said to exist in the same sense as mathematical objects such as sets and relations, but they cannot exist at a particular place and time without some physical encoding or embodiment.
The universal class of individuals. This is the root node of the ontology.
The class of
s whose properties can be inherited downward in the class hierarchy via the
is a sentence-forming
. Each tuple in the
is a finite, ordered sequence of objects. The fact that a particular tuple is an element of a
is denoted by '(*predicate* arg_1 arg_2 .. arg_n)', where the arg_i are the objects so related. In the case of
s, the fact can be read as `arg_1 is *predicate* arg_2' or `a *predicate* of arg_1 is arg_2'.
of relations. There are two kinds of
s both denote sets of ordered n-tuples. The difference between these two
es is that
s cover formula-forming operators, while
s cover term-forming operators.
s that require exactly three arguments.
s relate three items. The two
Belongs to Class
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