Anchor:  Ca'daan smiled at him.
Entailed: She grinned.
Contradiction: Ca'daan spit at him.
Contradiction: The dancers sat on stage in bland clothes.
Contradiction: Technology boosters never stop thinking about tomorrow. Technology in the early days included railroads, electricity, telephones, radio, and automobiles. 
Contradiction: The teenagers are having fun on the roller coaster.
Contradiction:  it helps break down functional barriers that can affect productivity and impede improvement efforts.