Anchor: yeah yeah you know how that changes
Entailed: You understand how that doesn't stay the same. 
Contradiction: You know how that stays the same. 
Contradiction: I have lost sight of the forest
Contradiction: A man looks through a telescope.
Contradiction: They would need to have at least three months worth of sailing practice before taking a boat out on their own.
Contradiction: A bunch of people in a crowd.