Anchor: Unstructured play encourages independent thinking and allows the young to negotiate their relationships with their peers, but kids ages 3 to 12 spent only 12 hours a week engaged in it.
Entailed: The hours of non-adult-directed playtime among young children and preteens was recorded and observed, totaling 12 hours each week 
Contradiction: The children studied were all above the age of seven.
Contradiction: Three people are on their computers.
Contradiction: This is larger than a mug.
Contradiction: The city is built inside of a deep valley.
Contradiction: He should not be there.