Anchor: Another knew all about dredging canals and the last one was an electronics engineer--a field in which Dave was far more competent.
Entailed: Dave was far more competent as an electronics engineer than anything else.
Contradiction: Dave was great at everything.
Contradiction: In his trade, the answer was to always reduce circuits.
Contradiction: The engineering and analysis division reviewed and approved the report for publication 
Contradiction: The people are in Asian
Contradiction: Parents just let there kids run around everywhere.