Syllogism
What is Syllogism?
A syllogism is the tool that connects a general rule to a specific fact. Major premise (the rule): “Projects with large fixed costs must pass a needs assessment.” Minor premise (the fact): “The new branch office is a project with large fixed costs.” Conclusion: “The new branch office must pass a needs assessment.” When the premises are true and the form is valid, the conclusion follows necessarily — anyone tracing the same path lands on the same answer, which is exactly what makes a syllogism useful for settling an argument at work.
Syllogism: common mistakes and how to handle them
Common mistakes: (1) Undistributed middle — “Good managers communicate well; Sam communicates well; therefore Sam is a good manager.” Communicating well is one trait of a good manager, not a sufficient condition, so the middle term never actually joins the two ends. (2) A major premise that is false, or true in general but not applicable to this case. (3) Equivocation — the same word carries a different meaning in each premise, so the two halves never really meet.
What the Syllogism questions test
supplying a missing premise (what unstated rule is this argument leaning on?); judging whether a syllogism is valid and, if not, which step fails; spotting an undistributed middle; rewriting a piece of workplace reasoning into rule–fact–conclusion form and checking each part.