Anchor: During PE, the exercises were designed to practice joystick skills and stretch the spine.
Entailed: The exercises were spine stretching ones.
Contradiction: Joystick skills are developed naturally, not through exercises.
Contradiction: Pundits and writers of the conservative variety never muse on anything. 
Contradiction: We used the agricultural benefits model for analysis.
Contradiction: The pitcher is asleep.
Contradiction: The prototype was ordered and was supposed to be approved by a chief who was known for being aggressive.