 The reason you get offended or shut down someone when they call you out on something is most likely because you think it's true. Think about it. If you didn't agree, then it wouldn't even faze you. It wouldn't even bother you. Think about something that you know about yourself for sure. Maybe it's that you have brown eyes and someone comes at you and they're like, oh no, you have blue eyes. You have blue eyes. Are you really going to care enough to fight back? Probably not because you know it's not true. If you truly don't care and have no emotional attachment to it, it's because you don't believe it to be true. The next time you get upset or angry when someone calls you out on something, look in the mirror.