One account says that kull before the negative distributes denial to each member, while a preceding negation denies universality. An objection notes that different logical analyses—indefinite, modified affirmative and simple negative—can sometimes bring both constructions close in meaning.
The debate therefore requires two stages: identify the precise type of predication, and then ask whether kull establishes a new content or reinforces an earlier one.
Not every objection denies the general rhetorical contrast. Some disagreements arise because the commentators adopt different starting analyses of the same expression.