There are certainly things we do not understand in physics. New physics is being made every day with quantum processes now appearing to play a role in biological reactions. Or messages can now be passed on using Neutrinos (no electromagnetic spectrum). This would have seem like science fiction 1 decade ago but it is now real. How can you be so sure that all the effect reported by the researcher in parapsychology, some of them published in major peer reviewed journal, are wrong. Henry James, a major philosopher and Harvard professor at the turn of the 20th century, was talking about radical empiricism were unexplained phenomena should be studied with the scientific method. It seems that you are taking a leap of faith that this is not necessary. Am I right?