Anchor: Some information in a case study is likely to be judgmental, particularly when observer and participant-observer modes of data collection are used.
Entailed: Observer and participant-observer modes of data collection are likely to bring some element of judgement to a case study.
Contradiction: Case studies using observer and participant-observer modes of data collection are always totally non-judgemental.
Contradiction: the students are under the ocean
Contradiction: Two people are playing a game together.
Contradiction: People are lounging on a sunny beach.
Contradiction: A dog is playing in water.