Anchor: Alexander Cockburn once imagined this MacNeil/Lehrer  And now, for another view of Hitler ...
Entailed: Cockburn imagined another view of Hitler.
Contradiction: Cockburn never said anything about Hitler.
Contradiction: My stepdad has never bought a computer before in his life.  
Contradiction: A boat leaves the shore.
Contradiction: Two young people arguing.
Contradiction: The sentence is citing a separate reference from the main body.