In theory I am an agnostic, but pending the appearance of rational evidence I must be classed, practically and provisionally, as an atheist. The chance's of theism's truth being to my mind so microscopically small, I would be a pedant and a hypocrite to call myself anything else.
H. P. Lovecraft (1999). “The Call of Cthulhu and Other Weird Stories”, p.11, Penguin