Anchor: On his keyboard he typed various letters and numbers, which would become computer programs for the 0-1 Computer Associates company.
Entailed: Letters and numbers typed on a keyboard can become computer programs. 
Contradiction: He did not know how to use a keyboard. 
Contradiction: The children are made of chocolate
Contradiction: Our friends frequently invite us to their house for dinner.
Contradiction: This was a terrible winter with many blizzards. 
Contradiction: People are in a raft.