Anchor: Tuppence remained for some minutes gazing after him.
Entailed: Tuppence watched him for more than a few minutes. 
Contradiction: Tuppence is blind and couldn't see him. 
Contradiction: A wet black dog is floating up in the sky
Contradiction: People have married girls for centuries.
Contradiction: The welfare cannot be adjusted, despite evidence it should be.
Contradiction: Organizations can expect greater success with security-related efforts when they make time to manage their information technology.