Text: For example, if we were asked to study what caused the Three Mile Island disaster and scoped the job to describe whether required safeguards were complied with, this would not be a case study.
Entailment: This would not be a case study if we were asked to study what caused the Three Mile Island disaster and scoped the job to describe whether required safegaurds were complied with.
Contradiction: Studying what caused the Three Mile island disaster would be a case study.