Every panel member is senior. No senior person is new. Some interns are panel members. Every intern has an identity card. Which conclusion must follow?
Correct answer: A. Some identity-card holders are not new.
- A. Some identity-card holders are not new.
- B. All identity-card holders are senior.
- C. Some new people are panel members.
- D. All senior people are interns.
Explanation
Some interns are panel members, so they are senior. Senior people are not new, and every intern has an identity card. Thus, some identity-card holders are not new.
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About Logical Deductions
Logical deductions require conclusions to be drawn from stated facts, conditions and relationships without adding outside information. The work includes handling all, some and none statements, necessary and sufficient conditions, ordering restrictions, true or false conclusions, and the difference between what must be true and what could be true.
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