In Hindu and Indian traditions, palmistry is often connected with samudrika shastra, the study of bodily marks and forms. It sits near astrology, physiognomy, and other interpretive systems that try to read character and fate from visible signs.
That makes palmistry historically and culturally significant. It does not automatically make it factually true in the modern evidence sense. A thing can be old, elaborate, and deeply meaningful without behaving like a laboratory instrument.
The best answer is therefore split: palmistry is true as a traditional interpretive practice in parts of Hindu culture, but its stronger predictive claims remain matters of belief rather than demonstrated fact.
