Rationalist n. : One who accepts rationalism as a theory or system; also, disparagingly, a false reasoner. See Citation under Reasonist.

Example:
Has anyone ever actually heard a Rationalist try to refute creation with evolution?

Taxonomy
Rationalism, philosopher, rationalists, Neoplatonism, empiricist, truths, History of rationalism, Philosophy, René Descartes, soul, rationalist, theory, continental rationalism, Gottfried Leibniz, Socrates, Immanuel Kant, rational soul, epistemology.

Defination from the web:
rationalist and empiricist (Lacey 286–287) ... To the rationalists he argued, broadly, that pure reason is flawed when it goes beyond its limits and claims to know those things that are ...