- Syllogism is defined as logical reasoning where you arrive at a conclusion by looking at two other premises or ideas.
If you know all squares are rectangles and all rectangles are shapes, and you deduce from this that all squares are shapes; this is an example of syllogism.
syllogism definition by Webster's New World
- an argument or form of reasoning in which two statements or premises are made and a logical conclusion is drawn from themEx.: All mammals are warmblooded (major premise); whales are mammals (minor premise); therefore, whales are warmblooded (conclusion)
- reasoning from the general to the particular; deductive logic
- an instance of subtle, tricky, or specious reasoning
Origin: Middle English silogisme ; from Middle French ; from Classical Latin syllogismus ; from Classical Greek syllogismos, a reckoning together ; from syllogizesthai, to reckon together, sum up ; from syn-, together plush logizesthai, to reason ; from logos, word: see logic
syllogism definition by American Heritage Dictionary
- Logic A form of deductive reasoning consisting of a major premise, a minor premise, and a conclusion; for example, All humans are mortal, the major premise, I am a human, the minor premise, therefore, I am mortal, the conclusion.
- Reasoning from the general to the specific; deduction.
- A subtle or specious piece of reasoning.
Origin: Middle English silogisme, from Old French, from Latin syllogismus, from Greek sullogismos, from sullogizesthai, to infer : sun-, syn- + logizesthai, to count, reckon (from logos, reason; see leg- in Indo-European roots).