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Entity > Abstract > Proposition

Proposition
subject			fact

Proposition	documentation Propositions are Abstract entities that express a complete thought or a set of such thoughts. As an example, the formula '(instance Yojo Cat)' expresses the Proposition that the entity named Yojo is an element of the Class of Cats. Note that propositions are not restricted to the content expressed by individual sentences of a Language. They may encompass the content expressed by theories, books, and even whole libraries. It is important to distinguish Propositions from the ContentBearingObjects that express them. A Proposition is a piece of information, e.g. that the cat is on the mat, but a ContentBearingObject is an Object that represents this information. A Proposition is an abstraction that may have multiple representations: strings, sounds, icons, etc. For example, the Proposition that the cat is on the mat is represented here as a string of graphical characters displayed on a monitor and/or printed on paper, but it can be represented by a sequence of sounds or by some non-latin alphabet or by some cryptographic form
	has axiom (=> (instance ?SENTENCE Sentence) (exists (?PROP) (and (instance ?PROP Proposition) (containsInformation ?SENTENCE ?PROP))))
	is second domain of containsInformation
	is second domain of realization
	is a kind of Abstract
Abstract	is disjoint from Physical
Entity	is first domain of documentation
	is first domain of element
	is first domain of equal
	is first domain of IdentityFn
	is first domain of instance
	is first domain of relatedExternalConcept
	is first domain of relatedInternalConcept

Kinds of Proposition :

• FieldOfStudy (2 facts) - An academic or applied discipline with recognized experts and with a core of accepted theory or practice. Note that FieldOfStudy is a subclass of Proposition, because a FieldOfStudy is understood to be a body of abstract, informational content, with varying degrees of certainty attached to each element of this content
• NormativeProposition (10 kinds, 23 facts) - A Proposition with normative content, i.e. a Proposition that contains a judgement about the way things ought to be
• Procedure (2 kinds, 10 facts) - A sequence-dependent specification. Some examples are ComputerPrograms, finite-state machines, cooking recipes, musical scores, conference schedules, driving directions, and the scripts of plays and movies