First I'm sorry to disturb, but I am a writer in my language and in need of a native American-English Speaker, so I thought it's good to register here. It's about the following conversation: 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.