well... if the definition of the word being that there is no measurable evidence i suppose so...but how would we know? The supernatural itself would have to inform us and the only evidence we would have would be subjective.
It would seem to me that you add your unevidenced beliefs on top of science.
ev·i·dence (v-dns) n. 1. A thing or things helpful in forming a conclusion or judgment: The broken window was evidence that a burglary had taken place. Scientists weigh the evidence for and against a hypothesis. 2. Something indicative; an outward sign: evidence of grief on a mourner's face. 3. Law The documentary or oral statements and the material objects admissible as testimony in a court of law. tr.v. ev·i·denced, ev·i·denc·ing, ev·i·denc·es 1. To indicate clearly; exemplify or prove. 2. To support by testimony; attest.