Anchor: He wasn't at all sure of how much he could extrapolate from what he'd read in the book on Applied Semantics, but he knew he needed a control--a symbol of the symbol, in this case.
Entailed: He did not know how to apply what he read.
Contradiction: The book told him exactly what to do.
Contradiction: A musician plays the banjo.
Contradiction: There is a girl shoveling snow.
Contradiction: The mixing of adult and kid activities makes the list a creepy place. 
Contradiction: A woman by a sign.