A proposition is a central concept in the philosophy of language, semantics, logic, and related fields, often characterized as the primary bearer of truth or falsity. It can be thought of as a statement or an idea that people can consider or discuss whether it is true. Propositions are also often characterized as being the kind of thing that can be believed, doubted, or denied, or is either true or false. In Aristotelian logic, a proposition is a particular kind of sentence (a declarative sentence) that affirms or denies a predicate of a subject, optionally with the help of a copula. In modern logic, the term "proposition" is often used for sentences of a formal language. A proposition can be assigned one of two truth values, true or false.
It is important to note that the term "proposition" has a broad use in contemporary philosophy and can refer to different things depending on the context. For example, it can refer to the primary bearers of truth-value, the objects of belief and other propositional attitudes, or the sharable objects of the attitudes. In everyday language, "proposition" can also refer to an offer or suggestion, usually in business, or a plan or scheme proposed.
In logic, a proposition is a declarative sentence that is either true or false. It is important to note that not all sentences are propositions. For example, questions, imperatives, and sentences that are neither true nor false are not propositions.
