Read the following statements and conclusions: Statements: Some boys are men. No man is black. Conclusions: 1. Some boys are not black. 2. Some men are boys. Which of the above conclusions logically follow from the given statements?

Difficulty: Medium

Correct Answer: Both conclusions 1 and 2 follow.

Explanation:


Introduction / Context:
This is a two statement syllogism problem involving boys, men and the property of being black. You are given one "some" type statement and one "no" type statement, and then asked whether each of two proposed conclusions follows. Such questions test your ability to reason about intersections and exclusions between sets.


Given Data / Assumptions:


    • Statement 1: Some boys are men. (So there is at least one individual who is both a boy and a man in the logical sense used here.)

    • Statement 2: No man is black. (The set of men and the set of black people do not overlap.)

    • Conclusion 1: Some boys are not black.

    • Conclusion 2: Some men are boys.


Concept / Approach:
"Some boys are men" means that the intersection between Boys and Men is non empty. "No man is black" means that the intersection between Men and Black is empty. We can use these two facts together to decide whether certain subsets are definitely non black and whether some men must also be boys.


Step-by-Step Solution:
Step 1: From Statement 1, we know there exists at least one person who is both a boy and a man. Call such a person X. Step 2: From Statement 2, no man is black. This means that any person who is a man cannot be black. Step 3: Since X is a man, X is not black (by Statement 2). But X is also a boy (by Statement 1). Thus there exists at least one boy who is not black. This directly supports Conclusion 1. Step 4: Now interpret Statement 1 more carefully. "Some boys are men" means that at least one individual belongs to both the set of boys and the set of men. This is equivalent to saying "Some men are boys", because intersection is symmetric. Step 5: Therefore, there exists at least one man who is also a boy. That is exactly what Conclusion 2 states. Hence Conclusion 2 also follows from the given statements.


Verification / Alternative check:
Draw three sets: Boys, Men and Black. Place Boys and Men so that they overlap in some region, reflecting "Some boys are men". Then place the Black set such that it does not intersect Men at all, to satisfy "No man is black". The overlapping region (boys who are men) lies completely outside Black. This region proves both that some boys are not black (Conclusion 1) and that some men are boys (Conclusion 2).


Why Other Options Are Wrong:
Option A and Option B each recognise only one of the valid conclusions and ignore the other. Option D says neither conclusion follows, which contradicts the clear intersection and exclusion relationships described above. The logic of the statements supports both conclusions simultaneously.


Common Pitfalls:
A frequent error is to read "Some boys are men" as "boys and men are entirely separate sets" or to forget the symmetric nature of the intersection: if some boys are men, then some men are also boys. Another mistake is to think "No man is black" tells you nothing about boys, even when some boys are known to be men. Careful attention to overlap is essential.


Final Answer:
Both conclusions are logically forced by the statements, so both conclusions 1 and 2 follow.

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