Anchor: He tried to design a set of cams, like the tide machine, to make multiple tracings on paper similar to a continuous horoscope, but finally gave it up.
Entailed: He tried to make a set of cams, but gave up on it.
Contradiction: His first attempt at designing a set of cams was successful.
Contradiction: A boy is building a sandcastle.
Contradiction: There are people playing a hockey game.
Contradiction: They could not come to an arrangement.
Contradiction: I have never heard her name until just now.