Statements: All P are Q. All Q are R. Conclusion: Some R are P. This conclusion is
Correct answer: A. valid
- A. valid
- B. invalid
- C. contradictory
- D. unrelated
Explanation
The chain places P inside R, and since P is a non empty class, it follows that at least some R are P. This move from a universal to a particular is valid in traditional syllogistic logic, which assumes the classes have members. The stronger claim that all R are P would not follow.
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About Syllogisms
Syllogisms use categorical statements such as all, some and no to establish relationships between groups. Questions require checking whether conclusions necessarily follow from the premises, often by mental set relationships or Venn diagrams, and distinguishing valid deductions from conclusions that are merely possible.
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