 The Intuition/Deduction thesis, the Innate Knowledge thesis, and the Innate Concept thesis are essential to rationalism. Since the Intuition/Deduction thesis is equally important to empiricism, the focus in what follows will be on the other two theses. To be a rationalist is to adopt at least one of them: either the Innate Knowledge thesis, regarding our presumed propositional innate knowledge, or the Innate Concept thesis, regarding our supposed innate knowledge of concepts.