Anchor: One security manager thought that requiring such signed statements served as a useful technique for impressing on the users the importance of understanding organizational policies.
Entailed: Requiring signed statements serves as a useful technique for getting users to understand the importance of organizational policies. 
Contradiction: Signed statements don't do anything and don't help the user comprehend anything. 
Contradiction: volume variables and price variables are the same thing.
Contradiction: A man is using a metal detector on the beach
Contradiction: The children are at school.
Contradiction: Nature is worshiped at Ise.