Anchor: A white dog drinks water on a mountainside.
Entailed: There is a dog drinking water right now.
Contradiction: The dog has no water to drink and is upset.
Contradiction: 3rd party sorters cost the same as postal service sorters. 
Contradiction: Crabs, octopus, lemon and prawns are all included.
Contradiction: I write that you are terrible at ferreting out instances of anything.
Contradiction: Guys jumping for a Frisbee.