Categorical Proposition

A categorical proposition is a part of deductive reasoning that contains two categorical terms, the subject and the predicate, and affirms or denies the latter of the former. Categorical propositions occur in categorical syllogisms and both are discussed in Aristotle's Prior Analytics.


Midshipman Davis serves on H.M.S. Invincible. (subject: Midshipman Davis; predicate: serves on H.M.S. Invincible)
Some politicians are corrupt. (subject: politicians; predicate: corruptness)
Nobody ever got fired for buying IBM. (subject: people; predicate: getting fired for buying IBM)

The subject and predicate are called the terms of the proposition. The subject is what the proposition is about. The predicate is what the proposition affirms or denies about the subject. A categorical proposition thus claims something about things or ways of being: it affirms or denies something about something else.

Categorical propositions are distinguished from hypothetical propositions (if-then statements that connect propositions rather than terms) and disjunctive propositions (either-or statements, claiming exclusivity between propositions).

Read more about Categorical PropositionQuality, Quantity and Distribution, Schema

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Categorical Proposition - Schema
... The general schema of categorical propositions is Quantifiers have scope, namely, the first whole proposition, simple or compound, to their right ... A general proposition is one with a quantifier it can be existential or universal ... A singular proposition lacks a quantifier and variables, and uses only constants, for example, "Ms" ...
Non Existing - Predicative Nature
... Brentano argued that every categorical proposition can be translated into an existential one without change in meaning and that the "exists" and "does not exist" of the ... He showed this by the following examples The categorical proposition "Some man is sick" has the same meaning as the existential proposition "A sick man exists" or "There ... The categorical proposition "No stone is living" has the same meaning as the existential proposition "A living stone does not exist" or "there is no living stone" ...

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