Anchor: Normal precautions apply here as beware especially of water-skiers and speed-boats, which sometimes stray from their flagged areas.
Entailed: You need to watch out for other people in the water.
Contradiction: No other people are allowed on the water, so you don't need to look out.
Contradiction: Two small children are flying kites in the park.
Contradiction: A little white dog is getting a stick.
Contradiction: Nobody is reading
Contradiction: I'll recommend you another good book, do you like frightening things?