Anchor: I've lived through such damning times before, and I know that they are sometimes necessary.'
Entailed: It is sometimes necessary to have bad times. 
Contradiction: I have never lived through such a damning time. 
Contradiction: The musician is taking a break.
Contradiction: A doctor is performing an operation.
Contradiction: Absolutely wonderful.
Contradiction: A man dressed in black looks at music with a tuba next to him.