" In W.H. Mallock’s satire "The New Republic,” a character representing Dr. Jowett is made to admit that an atheist opponent can disprove the existence of God, as he would define him. “All atheists can do that.” This does not, however, disturb the doctor’s faith. “For,” he says, “the world has at present no adequate definition of God; and I think we should be able to define a thing before we can satisfactorily disprove it."

-A.J. Ayer "

― S.T. Joshi , Atheism: A Reader