Anchor: I headed straight for the front of the train, the cockpit- the driver's den.
Entailed: I went to where the train driver sat.
Contradiction: I went to where the back of the train.
Contradiction: The rate structures of first class and standard a are totally identical.
Contradiction: There is a real problem with the dense population.
Contradiction: The rocks are only 2 million years old.
Contradiction: A statistician is consulted when data seems unusual or doesn't meet necessary assumptions.