In analytic Western philosophy, it is said to be two versions of naturalism. The first one is ontological and the second is methodological. Ontological version suggests that there are no supernatural entities. The methodological one argues that there are or should be no categorical distinctions between philosophy and science. I, herein, argue that these two versions exclude each other. Here are my major reasons. What is to be acknowledged as supernatural or natural cannot be foreknown. Science is subject to an everlasting revision both in terms of theories and values. Philosophers such as Quine or Philipp Frank even suggested that “If I saw indirect explanatory benefit in positing … spirits … I would joyfully accord them scientific status” ...