When a philosophy asserts that it’s the “philosophy of reason,” it reveals its ignorance of the role that reason plays in the development of knowledge. The last two words in the phrase “philosophy of reason” are superfluous, because every philosophy has to be a philosophy of reason. Every intellectual effort, rational or irrational, must entail the use of reason. Can you develop a nihilistic system of thought without using reason? Can you come up with a doctrine that denies the existence of the material world without using reason? Even to reject the role that reason plays in the development of knowledge you need reason. Even to lie you must use reason.