Anchor: A generation ago, dentists filled teeth and cast dentures because that's all they knew.
Entailed: Years ago dentists filled teeth and cast dentures since they only knew that. 
Contradiction: Dentistry knew more than filling teeth years ago. 
Contradiction: I do not have to do anything to replace it.
Contradiction: Two older men are using binoculars.
Contradiction: My family lives in Dallas.
Contradiction: He started to drive the English from Scotland after he became king.