Between the upper and lower limits lie many distinguishable grades. One source of variation is the speaker's ability to notice and respond to the fine-grained requirements of different contexts.
A terse explanation may suffice for an expert yet confuse a beginner. A detailed answer may help a beginner yet be excessive for someone asking only for a ruling.
The relevant question is how fully and precisely the utterance satisfies the important demands of its setting. Attractive diction may assist that achievement, but does not replace it.