 In 2006, he signed a document written by the Washington DC office of the Center for Inquiry called the "Declaration in Defense of Science and Secularism".This document expressed worry about the "disdain for science" expressed by many Americans, and "the persistence of paranormal and occult beliefs".Furthermore, in 2011 he wrote an opinion piece in "The New York Times" criticizing ESP research by Daryl Bem, stating that "I have little doubt that Professor Bem's experiments will fail (to be replicated)".