Anchor: Of these ways, the approaches that most differentiate case studies from other techniques are direct observation and participant observation.
Entailed: Direct observation and participant observation differentiate case studies from other techniques.
Contradiction: Case studies are the same as other techniques.
Contradiction: You'd be thrilled to hear what my mortgage is.
Contradiction: Just a single guardian.
Contradiction: The man sits in front of the kids.
Contradiction: A man rockclimbing.