Paper 1 · Logical Reasoning
Which one of the following validly follows from 'Only goods trains stop at this station'?
ASome goods trains stop at this station
BAll goods trains stop at this station
CNo train ever stops at this station
DAny train that stops at this station is a goods train ✓ Correct
Correct answer: (D) Any train that stops at this station is a goods train — 'Any train that stops here is a goods train' validly follows, so that is the answer.
Explanation
★'Any train that stops here is a goods train' validly follows, so that is the answer.
★'Only goods trains stop here' means stopping here implies being a goods train.
★So every train that does stop must be a goods train.
★It does not follow that some or all goods trains actually stop here.
★The word 'only' fixes a necessary condition, not that any train stops at all.
★So the answer is 'any train that stops at this station is a goods train'.
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