Anchor: Boat rides are available on the river when the water is deep enough.
Entailed: There are boat rides on the river if there is enough depth in the water.
Contradiction: Boat rides are always available in the river.
Contradiction: Boats operate on the river regardless of its depth.
Contradiction: His attractiveness was due to having nice eyes.
Contradiction: I have the TI one thousand for my purposes at work.
Contradiction: The man went swimming in the ocean