system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do people in India know which caste I am?

I'm an American of Indian ancestry and reading news about intercaste violence. If I visit India, how will I be viewed in the caste system? I don't even know which caste I am.
gpt
In modern times it can get blurred, people from different castes intra-marry, or even different states. Some clues exist, your last name can indicate what caste your family is from. Sometimes different castes use a different pronunciation or word, and that can give a hint. So can the style of traditional clothes worn can also give geographic or caste hints.

Think of it this way, can you tell if someone is from rural Alabama? Probably, just as much as you can tell If someone is from the inner city or England. Different fashion, food preferences, and accent or words.

Could someone pretend to be a different caste, sure but usually by adulthood, those difference are pretty engrained.