Abstract
Back in the early 1960s, Karl Rahner acknowledged that ‘religious agnosticism’ did have “some truth” in it [meint etwas Richtiges]. On the Hegelian assumption that a thing being defined involves as much what it is not, as what it is, this paper will explore in what sense Rahner thought that religious agnosticism does contain an element of truth, by contrasting his interpretation of its component parts to that of the nineteenth century agnostic trio of Herbert Spencer, Thomas H. Huxley, and John Tyndall.