Anchor: If Bauerstein's the murderer, nothing could be simpler than for him to substitute some ordinary coco for his sample, and send that to be tested. 
Entailed: Bauerstein could fake his innocence by using some hot chocolate for the test.
Contradiction: He is suspected of committing fraud.
Contradiction: PC technology has not increased its market presence.
Contradiction: A child wears a helmet
Contradiction: The person wearing a straight-jacket.
Contradiction: There is a group of people.