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

Explanation

What follows is that any train stopping here is a goods train.

'Only goods trains stop here' does not say all goods trains stop here.

'Only P are S' means every S is a P, restricting the stoppers to goods trains.

So a train's stopping at this station guarantees it is a goods train.

This is the correct reading of an exclusive 'only' proposition.

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