I am an English learner and have a question to the following American-English conversation, so can a native American-English Speaker please help me? Bryan: But they are not the same then. Cathy: No they aren´t. The "no" confuses me. So I ask myself what Cathy want's to say with her answer: a) That's wrong. In my opinion they are the same. b) I agree, They are not the same.