Anchor: This brief period may have been the most fertile of his career.
Entailed: Never in his career had he been so productive.
Contradiction: He accomplished more in a brief period than anyone has done in their entire career.
Contradiction: This would prove to be a low in an otherwise sparkling career.
Contradiction: The least fertile periods of his career was this brief one.
Contradiction: I won't prove anything to you.
Contradiction: My husband likes computers a lot.