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Sometimes one says that a proposition is what is expressed by a closed sentence, to distinguish it from what is expressed by an open sentence, or predicate.

Whether propositions are real entities, and if so of what sort (e.g., Platonic abstracta), is a matter of philosophical dispute.

In Aristotelian logic a proposition is a particular kind of sentence, one which affirms or denies a predicate of a subject, and thus asserts something true or false. Propositions fall unto three classes. Universal proposition s, such as "all men are mortal" affirm or deny the predicate mortal of the "whole of" their subject, i.e. the entire class of things that the subject applies to. Particular proposition s, such as "some men are mortal" affirm or deny the predicate of only part of the subject. Singular proposition s, such as "Socrates is a man" present a difficulty. Usually they were regarded as a universal proposition, since they can only be true of a single object, and thus true of all the objects (one) they possibly can be true of. On the other hand, "they are in truth the most limited kind of particular propositions".

See also: symbolic logic, truthmaker, propositional logic

In many U.S. states, a proposition is a ballot measure consisting of a statute or constitutional amendment "proposed" to the voters for their approval. It can take the form of an initiative or referendum. For example, see the list of California ballot propositions.

Proposition is also a name given, in debateDebate is a formalized system of (usually) logical argument. It is a rule-governed contest with two or more sides, presided by a judge. Each side is attempting to win the approval of a designated audience, such as a judge. Debate is a highly organized acts, to the team which supports and tries to prove a motionA motion is a formal step to introduce a matter for consideration by a group. It is a common concept in parliamentary procedure and in the procedure of trade unions, students' unions, corporations, and other deliberative assemblies. Motions can be oral or.

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Topics: Proposition Propositions Sentence Subject Logic True Predicate...

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Propositional knowledgePropositional knowledge or declarative knowledge is knowledge that some proposition is either true or false. This distinguishes propositional knowledge from know-how or procedural knowledge, which is the knowledge of how to perform some task. This article Propositional calculusA propositional calculus is a formal, deduction system, or proof theory for reasoning with propositional formulas as symbolic logic. It is also extensional. Compare, by contrast, predicate logic and modal logic, which also have their own calculi. A calcul PropositionIn modern logic, a proposition or ansatz is what is asserted as the result of uttering a sentence. In other words, it is the meaning of the sentence, rather than the sentence itself. Different sentences can express the same proposition, if they have the s Propositional attitudeA propositional attitude is a relational mental state connecting a person to a proposition. They are often assumed to be the simplest components of thought and can express meanings or content that can be true or false. In being a type of attitude they imp