Anchor: His office was spacious, but his bookshelf was bare except for a single textbook (American), a few patient files, and some knickknacks.
Entailed: There was a lot of space in his office, but his bookshelf was empty save for a single textbook, some patient files and knickknacks. 
Contradiction: His office was a mess without much free space. 
Contradiction: The market only has one type of vegetable.
Contradiction: The government does whatever they want. 
Contradiction: There are no family homes located near the Byzantine churches.
Contradiction: Usually, generalization is wanted.