Text: Adams suggested a simple rule for behavior while representing  Mean what you say, say what you mean, and don't do it in a mean way, he said.
Entailment: Adams had a suggestion for a simple rule about saying what you mean, meaning what you say, and not doing it in a mean way.
Contradiction: Adams' rule for behavior was to say what you mean and mean what you say, even if you have to do it in a mean way.