A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. A person is wearing a blue shirt. The shirt is also worn by another person. Can we conclude that the two people are the same? We turn now to other elements that distinguish a case study from a not-case study and a good case study from a not-good case study. If this premise is true, what does that tell us about whether it entails the hypothesis 'The case studies are all quite good.'?
yes
it is not possible to tell
no