The Principle of the Indiscernibility of the Identicals is a property that is very important when we try to prove the validity of the arguments made by Descartes. It says that any two things that are identical have the exact same properties. Descartes uses this property to defend his argument of the mind and body. Descartes believes that since the mind and the body have different properties that they cannot be identical. He even goes as far as saying the mind is better off without the body because they body can somehow distort perceptions making thoughts unclear. .
Although Descartes" argument makes certain points, I find it very difficult to make any sense of it. I believe that the mind and the body are two separate things, but I disagree when Descartes says the mind can survive without the body. If you have one without the other both entities seem insignificant. The mind and the body together create a strong force that we call life. Yet, Descartes feels that the mind would be better off without the body. So, I ask this question: what is the purpose of having a mind with out a body? I have trouble understanding the significance of a mind that is only used for thinking, or more specifically, doubting. The body is like a medium; it is the center of experience. The body is what feeds the mind and gives it something to think about. Without the body, the mind is essentially empty. Therefore, the existence of a mind without a body is pointless. .
The Principle of the Indiscernibility of Identicals can make a lot of sense if you look at it on a very simple level. But there is a more complicated level of thinking that takes away from the validity of the principle. People may lack certain knowledge that makes this principle invalid. If you take two objects, say a book and a chair, you can see by using the Principle of the Indiscernibility of Identicals that the two thing are not identical therefore they do not have the same properties.