Is the re-birth recurrence principle a belief or an assumption proved true by those more spiritually evolved in states of higher consciousness? Were there instances of verification or revelations in ancient or in recent times?
Punarapi jananam, punarapi maranam... is Adi Shankara's assertion. Attainment of Mokasha is getting out of this round and round unending continuous circle. Verification of experience in a repeating circle and verification of advanced experiences guiding a Mumukshu into a higher spiritual orbit is part of the same total phenomenon. Those ahead and graduated only can guide those who are new entrants.