It doesn’t take much study of the behavior of matter at the quantum level to realize that the impossible is not only possible, but going on all around you. That said, there is a great deal to be gained by maintenance of the null hypothesis till a good, evidence-based reason to abandon it comes along. Reincarnation, astral travel, ghosts, ancient aliens, fortune telling, homeopathic medicine or a ton of other claptrap people love to believe in due to the absolute lack of credible evidence that there is a grain of truth to it.