Related Ideas

Ontological Argument. Stanford Encyclopedia of Philosophy. A thorough survey of the Ontological Argument and its objections, including contemporary philosophical interest in the problem.

"Two Dogmas of Empiricism" by Willard van Orman Quine. Digital Texts in Philosophy. A revision of Quine's classic investigation of whether a criterion of synonymy is available to legitimize the distinction between analytic and synthetic. Difficult for beginners but worth the struggle.