Anchor: Many people, like them, have never come across it but have heard about it, so it must be there somewhere.
Entailed: It must be there somewhere even if like them, few have come across it. 
Contradiction: No matter what people have heard about it, there's nothing there. 
Contradiction: He was ugly.
Contradiction: There are people in the water.
Contradiction: Nema stared directly at it.
Contradiction: It is gone.