Anchor: Dell Computer, for instance, would be at least five times as hard to acquire today as it was a year ago.
Entailed: It would be at least five times harder to find a Dell computer today than a year ago.
Contradiction: It is more common than ever to see Dell computers today.
Contradiction: He was not convinced to make a giant weather wall. 
Contradiction: The man is riding his bike.
Contradiction: There are people walking in the field.
Contradiction: A skier is outside.