Neuroscientist David Eagleman is neither religious, agnostic, or atheist, instead he is forging a fourth-way of sorts as a possibilian, a term of his own devising:
Eagleman rejects not only conventional religion but also the labels of agnostic and atheist. In their place, he has coined the term possibilian: a word to describe those who “celebrate the vastness of our ignorance, are unwilling to commit to any particular made-up story, and take pleasure in entertaining multiple hypotheses.”