Text: As we will discuss later, several methods can be used in one job; these examples are only intended to highlight what is not, and what is, a case study.
Entailment: Several methods can be used in one job, and these examples are supposed to highlight what is and isn't a case study.
Contradiction: There is really only one viable method that can be used in a job, and these examples are meant to show you what is a case study.