Anchor: The sylph changed direction, and began to bob about.
Entailed: There was a sylph moving around.
Contradiction: The sylph was only able to travel in perfectly straight lines, and moved at a perfectly steady height. 
Contradiction: Two young men, one with folded arms, look off-screen.
Contradiction: The worker checks on the roof.
Contradiction: All of his operations occurred smoothly and right on schedule.
Contradiction: Some men spending time together.