Q. 1
Intelligence Tests
Difficulty: Medium
(1 Mark)
Some trees are tall. (a) All tall trees are pines. (b) Therefore all trees are pines.
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Step-by-Step Explanation & Concept Rationale
This is a logical fallacy of composition; tall trees being pines does not imply all trees are pines.
Q. 2
Intelligence Tests
Difficulty: Medium
(1 Mark)
(All Xs philosophers; No Ys philosophers...) If all women are Xs, which must be false?
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Step-by-Step Explanation & Concept Rationale
Based on the categorical constraints provided in the directions, this universal affirmative cannot be true.
Q. 3
Intelligence Tests
Difficulty: Medium
(1 Mark)
If all teachers are doctors, which can be deduced?
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Step-by-Step Explanation & Concept Rationale
If teachers are doctors and some teachers are Xs, it follows that some Xs are doctors.
Q. 4
Intelligence Tests
Difficulty: Medium
(1 Mark)
Which of the following must be true?
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Step-by-Step Explanation & Concept Rationale
Since teachers are Xs and all Xs are philosophers, it must be true that some teachers (the ones that are Xs) are philosophers.
Q. 5
Intelligence Tests
Difficulty: Hard
(1 Mark)
No monkey can sing but some monkeys can talk. Valid conclusion?
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Step-by-Step Explanation & Concept Rationale
If "No monkey can sing" is true, then it is universally true that all monkeys lack the ability to sing.
Q. 6
Intelligence Tests
Difficulty: Hard
(1 Mark)
Worms can crawl but birds can only fly and hop. Valid statement?
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Step-by-Step Explanation & Concept Rationale
If birds can only fly and hop, they are logically excluded from the ability to crawl.
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