Anchor: The class is taking a very important test.
Entailed: The students are quietly seated during an exam.
Contradiction: Some of the class have their hands raised and are shouting out.
Contradiction: At the time he was perfectly aware of what he was doing.
Contradiction: A group of people standing outside.
Contradiction: People are not aware that they can get cancer from smoking.
Contradiction: A different way to phrase it.