Most Helpful Girl
It can mean either , depending on who the person is. Usually I can determine if they are being sarcastic by their tone, eyes and expression on their face.
It's easier to determine if they are being insulting when you are face to face , but not so easy via text. It all comes down to how well you know the person. My mum often says ", right" and she couldn't be insulting or sarcastic if she tried. So when she says it, I know she is just acknowledging what I'm saying0
Most Helpful Guy
It depends on the tone. It is probably just a literal agreement. But if said in a sarcastic tone it's like saying they think you're an idiot.0