Anchor: A man does technical rock climbing.
Entailed: A person is ascending a climbing wall.
Contradiction: A man is sleeping in bed.
Contradiction: There is not a single amateur among Slate readers.
Contradiction: There are rentable canoes and kayaks for the Canche river.
Contradiction: This kind of approach is easy, and not tricky at all.
Contradiction: There are guided tours of the caverns.