the mind > language > statement > affirmation and denial > [adverb] > as an affirmative answer > in answer to negative question or statement > in contradiction of negative statement (2)
Used to contradict or disagree with a negative statement expressed or implied, e.g. ‘You didn't enjoy it.’ ‘Yes, I did.’
Used to contradict or disagree with a negative statement: = yes, adv. 1b.