Disamis

Disamis is a valid syllogistic mood in traditional logic, specifically within the third figure of syllogisms. A syllogism is a deductive argument consisting of two premises and a conclusion, where each premise and the conclusion is a categorical proposition. In a syllogism, three terms are used: the major term (predicate of the conclusion), the minor term (subject of the conclusion), and the middle term (which appears in both premises but not the conclusion).12

The valid moods of syllogisms were systematically studied by Aristotle, who used schematic letters to represent terms and identify argument patterns. Disamis is one of the valid moods in the third figure, characterized by its specific arrangement of propositions and terms, ensuring that if the premises are true, the conclusion must also be true.324