Anchor: A highly polished brass stud on the first step of the main staircase registers a height exactly 3 metres (10 feet) above sea level.
Entailed: The staircase is 3 meters above sea level.
Contradiction: The staircase is 5 meters above sea level.
Contradiction: The woman is cooking dinner.
Contradiction: I think that is almost impossible.
Contradiction: The woman is running a marathon.
Contradiction: the people are sitting.