Anchor: The names of the companies are confidential and were not known to the researchers.
Entailed: The researchers were not aware of the companies' names. 
Contradiction: The researchers knew the names of all of the companies involved. 
Contradiction: The least accomplished students are the most interesting to converse with.
Contradiction: The man is making music.
Contradiction: The protocols have no purpose at all.
Contradiction: The worker is doing construction.