Anchor: The Navy used early versions of the F/A-18 aircraft to demonstrate new component designs and new materials.
Entailed: The Navy demonstrated new component designs using early versions  of the F/A-18 aircraft.
Contradiction: The Navy didn't use the F/A-18 aircraft's early versions to demonstrate new component design.
Contradiction: The two men are not wearing clothes.
Contradiction: two children swimming with a seal
Contradiction: A man is sitting on the couch.
Contradiction: Kids are sitting on a raft.