Anchor: But it was mighty uncertain whether it would bear my weight.
Entailed: It was not a surety that it would hold up under my weight.  
Contradiction: I was certain that this would hold up under my weight.  
Contradiction: a woman is driving a car.
Contradiction: A man playing a guitar.
Contradiction: All six ISACs had been up and running since October 1999.
Contradiction: The man is inside