Anchor: For help in deciding the strength or weakness of corroborating evidence, consider the extent to which the corroborating evidence
Entailed: There are things you have to consider when trying to decide how strong or weak corroborating evidence is. 
Contradiction: Corroborating evidence is inherently weak. 
Contradiction: Geese are in the park.
Contradiction: The grill is hot.
Contradiction: The end was postponed by the welcome assistance of Timur the Kind.
Contradiction: The men are standing under the art.