Negative yes/no questions

One of the uses of a negative yes/no question is in the case that you expect the answer to be ‘Yes’, i.e. suggesting an affirmative verb. The following provides some examples:

'During these warm but comfortable autumn days, haven’t we all seen thousands of people walking round in jumpers and jackets, probably because they fear having to go into some refrigerated building/” ( = We have all seem…..)'

'But the title of this book is a bit odd: wasn’t cross-border finance the last, rather disappointing, globalization? (=Cross-border finance was the last……) '

This expression is for emphasizing the writer’s standpoint or belief.