Some books are novels. All novels are stories. Which conclusion follows?
Correct answer: B. Some books are stories
- A. All books are stories
- B. Some books are stories
- C. No book is a story
- D. All stories are books
Explanation
The books that are novels must also be stories, which guarantees that at least some books are stories, but nothing is known about the remaining books. A conclusion beginning with all cannot follow from a premise beginning with some. The reversal in the last option is invalid for the same reason.
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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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