Difficulty: Easy
Correct Answer: uncertain
Explanation:
Introduction / Context:This item tests whether two pairwise comparisons force a third comparison. We compare travel modes by relative speed (quicker means higher speed/less time). We must check whether “train vs. car” is determined from the two given premises.
Given Data / Assumptions:
Concept / Approach:
Step-by-Step Solution:
Let speeds be numeric: bus = 10 units.Choose train = 12 (train quicker than bus) and car = 14 (car quicker than bus). Then train quicker than car is false.Alternatively, if car = 11 and train = 15, then the claim is true. Both scenarios satisfy the premises, so the claim is indeterminate.Verification / Alternative check:
Graphically: both train and car lie to the right of bus on a speed line, but their mutual order is unspecified.Why Other Options Are Wrong:
true / false: Each can be consistent with the premises; neither is forced.both true and false: A single world cannot have contradictory comparisons; uncertainty reflects multiple possible worlds.Common Pitfalls:
Assuming transitivity incorrectly from “better than bus” for both modes. Transitivity needs a chain A > B > C to infer A > C, which we do not have here.Final Answer:
uncertain
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