Discussion
Statements: All the books are pencils. No pencil is eraser.
Conclusions:
1. All the pencils are books.
2. Some erasers are books.
3. No book is eraser.
4. Some books are erasers.
Answer: A
Correct answer: Only (3)
All books are pencils and no pencil is an eraser, so nothing that is a book can be an eraser - no book is an eraser, conclusion 3. Conclusions 2 and 4 assert the opposite, and conclusion 1 reverses a universal.
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