Josephson is one of the most well_known advocates of the possibility of the existence of paranormal phenomena. He has said that the scientist's motto should be, "Take nobody's word for it" (nullius in verba), which he says also includes the idea that, "if scientists as a whole denounce an idea this should not necessarily be taken as proof that the said idea is absurd: rather, one should examine carefully the alleged grounds for such opinions and judge how well these stand up to detailed scrutiny."