Anchor: The analyst was asked by him to report whether strychnine was, or was not, present. 
Entailed: An analyst was tasked to see if a chemical compound was there.
Contradiction: Strychnine was determined to be part of the compound without testing. 
Contradiction: A lady is walking into a store.
Contradiction: The children are smiling.
Contradiction: The man is standing in the apartment building.
Contradiction: Levitt had an interview with the Chronicle for Higher Education.