definition of syllogism
From Wikipedia, the free encyclopedia. A syllogism (Greek: ÏÏÎ»Î»Î¿Î³Î¹ÏÎ¼ÏÏ syllogismos, conclusion, inference) is a kind of logical argument that applies deductive reasoning to arrive at a conclusion based on two or more propositions that are asserted or assumed to be true.