I wouldn’t say that是什么意思?

意思是: 我不这么认为

例句

Person 1: I think this movie is the best of all time. Person 2: I wouldn't say that, there are definitely better movies out there.
人1: 我认为这部电影是有史以来最好的. 人2: 我不这么认为, 当然还有更好的电影.