Anchor: The following presumptions are useful in judging the competence of evidence.
Entailed: Presumptions can be useful in judging the evidence.
Contradiction: Presumptions cannot be useful in judging the evidence.
Contradiction: A dog is running away from a cow.
Contradiction: Men are watching their collegues work from a scaffolding.
Contradiction: I lifted my hands off the railing and fell off the train. 
Contradiction: A man, woman, and child ride on a motorbike together.