How many terms are in a standard categorical syllogism?

• A. Two terms
• B. Three terms
• C. Four terms
• D. There are three terms in a standard categorical syllogism.

Answer: (D)

In a standard categorical syllogism, exactly three terms are used: the major term, the minor term, and the middle term. The major term is the term that appears as the predicate in the conclusion, the minor term is the subject of the conclusion, and the middle term shows up in both premises to link the major and minor terms. This structure is what allows the conclusion to follow from the two premises: the middle term acts as the connection between the terms being compared. If you tried to have more or fewer terms, you’d break the standard form and lose that clear linking mechanism. So the statement that there are three terms accurately describes the conventional setup of a categorical syllogism.