The definition of the a Priori method is that we arrive at the truth using logic and reason. Priori translated means “that which comes first”. The premise of the Priori method is that empirical evidence (logic, organized observations, and measurements) is not necessary to make sense of the world. Individually, you can make sense of the world in a logical way. It is clear that the Priori method is practical. A good example would be mathematics. We can solve mathematical problems without empirical experiments. For example, 2 + 2 = 4. It is logical to assume that if you have 2 of something and you add 2 of the same thing you will have 4 of the same thing. Many math problems do not require scrutiny from your peers and careful observation; requires logic and reason. A person using the Priori method can assert that there are significant ways in which our concepts and knowledge are acquired independently of sensory experience; we do not need experiments to make sense of the world (Markie, 2004). This technique may be more robust than the persistence method and the authority method, but it is severely limited. Let's examine the limitations in the following example: Primates are capable of using human language. Alex the chimpanzee is a primate. In this example it is logical to conclude that the chimpanzee Alex is capable of using human language. In reality, Alex cannot use human language (Goodwin, 2010). Another example would be two people making each other reasonable,