Name, where your family is from, your diet can all indicate it. Even things like putting a hand on someone's shoulder to feel if they are wearing the thread th

Name, where your family is from, your diet can all indicate it. Even things like putting a hand on someone's shoulder to feel if they are wearing the thread the upper caste sometimes wear under their clothes. Apparently for those raised around the system it can be fairly easy to figure out over extended co-working.