Anchor: I call my home phone from the office at least once a day to see if any messages have been left.
Entailed: I need to call my home phone at least once a day to listen to unread messages.
Contradiction: I never call my home phone to listen to unread messages.
Contradiction: Runners gather for practice at a track with divided lanes.
Contradiction: Further efforts revealed that it was not especially hard to weld together parts of the sky. 
Contradiction: Few people walking on the roadside
Contradiction: Glad we got to talk