'This worker is a graduate. No one else in the factory is a graduate.' What follows?
AAll workers in the factory are graduates
BEverybody in the factory has a graduation certificate
CSome factory workers have higher qualification
DOnly one worker in the factory is a graduate ✓ Correct
Correct answer: (D) Only one worker in the factory is a graduate
Explanation
It follows that exactly one worker in the factory is a graduate.
The first premise gives one worker who is a graduate.
The second says no one else in the factory is a graduate.
One graduate plus none besides leaves precisely a single graduate.
Hence only one worker there holds a graduate degree.
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