sentences:  He has been an active contributor to an ongoing discussion concerning the date of the Buddha's death, and has argued that data supplied in Pali texts composed in Sri Lanka enable us to date that event to about 404 BCE.Whilst an undergraduate, Gombrich helped to edit the volume of papers by Karl Popper entitled "Conjectures and Refutations".Since then, he has followed this method in his research, seeking the best hypothesis available and then trying to test it against the evidence.