We should not think that anything that is not discovered by science or proven with logic does not exist, as not everything can be measured by hard data. Things like rebirth or soul cannot be checked by scientific instruments, at least not for the time being. However, as science continues to break new grounds, it is entirely possible that one day we might be able to do that. For now, logic, as we know it, is rendered helpless in the field of parapsychology because our sense organs are not equipped to provide us with useful data to do this kind of analysis.
~Depicted from THE HANDBOOK FOR LIFE JOURNEY - On Death And Rebirth-What Life Truly Is