Anchor: There would have to be a long period of chronic symptoms which would at once have attracted my attention. 
Entailed: There would have been symptoms for a long time.
Contradiction: There would have been symptoms for just a short time..
Contradiction: The boys are sleeping
Contradiction: Jews have an injunction against showing God.
Contradiction: The postal workers eat the canned goods.
Contradiction: Mary's parents lived here when she was born.