Anchor: A good case study explicitly identifies alternative explanations, lays out the chain of reasoning, and makes clear which conclusions rest primarily on the investigators' insightful recognition of patterns of evidence and which have been recognized in other ways.
Entailed: The presence of alternative explanations is the mark of a good case study.
Contradiction: Only bad case studies lay out a chain of reasoning.
Contradiction: Three teams are playing a softball game.
Contradiction: Canon made copiers sold under the Kodak name in the 1980s.
Contradiction: The children are all taking naps in their beds upstairs.
Contradiction: The stone shelf is covered in polished marble now.