Syllogism Questions: How to Solve Them in Logical Reasoning Tests
Syllogism: two premises, one conclusion. Middle term links categories. Four statements: All A are B, No A are B, Some A are B, Some A are not B. Rules: middle term distributed, no illicit distribution, one affirmative premise, negative premise → negative conclusion, particular premise → particular conclusion. Valid forms: Barbara, Celarent, Darii, Ferio, Cesare. Invalid: illicit conversion (All A are B ≠ All B are A), undistributed middle. Solve: identify terms, check types, apply rules, derive or eliminate, verify. Tips: Venn diagrams, practice invalid forms, read carefully.
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Frequently Asked Questions
Memorise all valid forms?
Helpful but not essential. Understanding rules more important.
Venn diagrams always work?
For categorical syllogisms, yes. Reliable method.
More than two premises?
Chain them. Break down step by step.