Anchor: On the endogenous dimension, postal density could in principle be tuned by the postal operator by adjusting quality of service.
Entailed: Postal density would change if the postal operator changed the quality of service. 
Contradiction: Nothing that the postal operator can do will affect the postal density. 
Contradiction: there is a woman dancing on a stage
Contradiction: Lifting at the site rarely goes over 100 feet (30 M) and 100 tons.
Contradiction: I lived in the big city and never traveled far from it.
Contradiction: The settlement had grown into a big city.