Anchor: Two dogs play with each other in the grass.
Entailed: Two dogs are having fun in the grass
Contradiction: two dogs are cuddling with one another
Contradiction: It should be achievable to answer questions adequately and have a manageable number of sites. 
Contradiction: It's impressive that such a nice fellow could be wrong twice.
Contradiction: Daytona Beach, Florida suffered an ice-storm in July.
Contradiction: A man practices martial arts.