Difficulty: Easy
Correct Answer: Conclusion I alone can be drawn
Explanation:
Introduction / Context:
This is a classic categorical reasoning problem involving a universal negative and a particular instance. We test which conclusions necessarily follow from the premises without importing extra labels (like “student”).
Given Data / Assumptions:
Concept / Approach:
From “No teacher is a bicycle-user” and “Anand is a bicycle-user,” we can infer “Anand is not a teacher” (valid by contrapositive / set exclusion). However, nothing is said about Anand’s other possible roles (student, staff, visitor, etc.).
Step-by-Step Solution:
1) Using A and B: If all Teachers ⊆ (not BicycleUsers), then any BicycleUser ∉ Teachers. Since Anand ∈ BicycleUsers, Anand ∉ Teachers ⇒ Conclusion I follows.2) Conclusion II (“Anand is a student”) adds a category never mentioned in the premises. It does not follow.
Verification / Alternative check:
A simple Venn diagram confirms: Anand lies in BicycleUsers; Teachers is a disjoint set from BicycleUsers. Membership in “Student” is undecidable.
Why Other Options Are Wrong:
“Both” and “II alone” overreach; “both cannot” ignores the valid exclusion inference for I.
Common Pitfalls:
Assuming a school-goer riding a bicycle must be a student. The premises do not justify that leap.
Final Answer:
Conclusion I alone can be drawn.
Discussion & Comments