 This heuristic is related to Grice’s maxim of manner and, specially, to the first submaxim (“Avoid obscurity of expression”) and the fourth (“Avoid prolixity”). If according to the second heuristic an unmarked utterance gives rise to a stereotypical interpretation, now we have that this interpretation is overruled if a marked utterance is produced. One of the clearest examples is double negation versus simple positive assertion. Compare “It’s possible the plane will be late” with “It’s not impossible that the plane will be late.”