Anchor: A boy skips a rock in a stream.
Entailed: A boy is outdoors.
Contradiction: A boy slips on a rock in a stream.
Contradiction: A water skier falls into the lake.
Contradiction:  Before a low-income person can receive appropriate legal assistance, that individual has to gain access to legal services system.
Contradiction: Several examples of his early works convinced me that he has never done anything worthwhile.
Contradiction: The children are outside.