Inept question: would it be possible to outright lie about ones’ caste, or is it easy enough for someone else to figure out? How? I don’t see an ounce of shame

Inept question: would it be possible to outright lie about ones’ caste, or is it easy enough for someone else to figure out? How? I don’t see an ounce of shame in doing so if it levels an unjust playing field.