Difficulty: Easy
Correct Answer: Neither conclusion I nor conclusion II follows
Explanation:
Introduction / Context:
This is another categorical reasoning question with three sets: games, sports, and exercise. The statements talk about some overlap between games and sports and a complete separation between games and exercise. The conclusions attempt to connect sports to exercise. Your task is to see whether such connections are logically required by the given information.
Given Data / Assumptions:
- Statement I: Some games are sports, meaning there is at least one activity that is both a game and a sport.
- Statement II: No exercise is a game, meaning sets exercise and games do not overlap.
- Conclusion I: All sports are exercise, claiming that sports set lies inside exercise set.
- Conclusion II: Some exercise are sports, claiming there is at least one element common to exercise and sports.
Concept / Approach:
Let G represent games, S represent sports, and E represent exercise. We know that the intersection G ∩ S is non empty, and that E ∩ G is empty. However, no statement links sports directly to exercise. The question is whether, despite this lack of direct connection, either of the conclusions is forced. In set theory terms, we must decide if S ⊆ E is required or if E ∩ S is required to be non empty, given only the two statements.
Step-by-Step Solution:
Step 1: Since some games are sports, draw a Venn diagram where G and S intersect in at least one region.
Step 2: Since no exercise is a game, draw E as a set that does not intersect G at all.
Step 3: Note that there is no restriction on how E relates to S, except that E cannot intersect any part of S that lies within G, because that part also belongs to G and E is disjoint from G.
Step 4: To test Conclusion I, "All sports are exercise," we would need every element of S to be inside E. However, nothing in the statements imposes this requirement.
Step 5: In fact, we already know that at least some S elements lie within G because G ∩ S is non empty. Those elements cannot be in E since E does not intersect G, so S cannot be fully contained in E.
Step 6: Therefore, Conclusion I is false because some sports that are also games cannot be exercises.
Step 7: For Conclusion II, "Some exercise are sports," we would need E ∩ S to be non empty. But this is also not forced. We could draw E completely outside S and G, creating a valid diagram where exercise has no overlap with sports at all.
Step 8: Since the statements allow both overlap and no overlap between E and S, we cannot say that some exercise must be sports.
Verification / Alternative check:
Construct two diagrams that satisfy the statements. In Diagram A, let some sports be games, and let exercise lie completely outside both games and sports. In this case, both conclusions about exercise and sports are false. In Diagram B, let exercise overlap with a part of sports that does not overlap games. Here Conclusion II becomes true, but Conclusion I is still false. The fact that different diagrams lead to different truth values for Conclusion II shows that it is not logically forced by the statements.
Why Other Options Are Wrong:
Option A assumes all sports are exercise, which conflicts with the existence of sports that are also games and cannot be exercises. Option B assumes some exercise are sports, which is not guaranteed. Option C claims both conclusions follow, which is even further from the truth. Option E introduces an additional claim about sports being neither games nor exercise, which may or may not be true and is not asked in the question.
Common Pitfalls:
Students often mistakenly assume that sports must automatically count as exercise and that exercise must have some relation to sports. However, logical reasoning questions treat these as abstract sets with no inherent real world overlap unless explicitly stated. Always base your reasoning solely on the given statements and what they force in the Venn diagram, not on common sense about physical activities.
Final Answer:
The correct option is Neither conclusion I nor conclusion II follows, because the statements do not establish any necessary relationship between sports and exercise beyond the restriction involving games.
Discussion & Comments