Anchor: Some studies collect data from a small number of sites but have no other features in common with case studies and offer none of their advantages.
Entailed: Some studies use a small number of sites, that are not similar to case studies.
Contradiction: The studies that collect data from a small number of sites give the best information.
Contradiction: She was single. 
Contradiction: the bvoy was dressed as a cowboy
Contradiction: Even though it is state sponsored, my engineering degree stands up to MIT. 
Contradiction: Some people are on a boat.