笛卡尔认为，唯一真正的科学是数学。他说，数学是唯一正确的科学。就确定性而言，数学在其知识层面上无疑是确定的。但是数学所给出的确定性与我们所寻找的确定性有很大的不同。数学告诉我们，不借助感官，智力是如何与某种确定的事物相一致的。但除此之外，数学毫无用处。数学作为达到某个确定的外部数的起点，是不会有任何结果的。数学仅限于智力。就确定性而言，它确实是真的。数学和其他科学的最大区别在于，数学是唯一符合确定性的科学。没有人能证明1 + 1不等于2。在应用数学作为怀疑方法的基础时，我否认数学是有用的。数学的思维方式与怀疑法的思维方式截然不同。意思是，回答世界之谜的思维，或者在这种情况下，是否一切都是幻觉，与数学知识领域有很大的不同。即使数学符合某种确定的东西，我相信数学仍然不是一门可以用来判断事物是否真实的科学，这是因为笛卡尔的怀疑方法是相当复杂的。数学不应该是中心科学，因为它是唯一符合某种确定事物的科学。就“如果不确定就不是真的”这句话而言，一个人不可能毫无争议地触及不可能的事情。这是因为怀疑的方法从一开始就没有明确的路径。用怀疑的方法通向确定的道路，最终将一事无成。
According to Rene Descartes, the only true science is mathematics. He states that, Mathematics is the only science that is indeed true. Insofar as certainty is concerned, there is no doubt that Mathematics is indeed certain in it’s plane of knowledge. But the certainty Mathematics emits is far different from the certainty we are looking for. Mathematics shows how the intellect can conform into something that is certain without the use of senses. But beyond that thinking, Mathematics is in no way useful. Mathematics as a starting point for reaching something that is certain outside numbers, will in no way bear any fruit. Mathematics is limited to the intellect. As far as certainty is concerned, it is indeed true. The big difference between Mathematics and all the other sciences is that, Mathematics is the only science that conforms to certainty. There is no way one can prove that 1 + 1 is not equal to two.In applying Mathematics as the basis for the method of doubt, I deny that Mathematics is useful. The mode of thinking in Mathematics is far distinct than the thinking used in the method of doubt. Meaning, the thinking in answering the mysteries of the world, or in this case, whether or not everything is an illusion, is far different from the realm of knowledge in Mathematics. Even if Mathematics conforms into something that is certain, I believe that Mathematics is still not a viable science in knowing whether or not something is true this is because the method of doubt of Rene Descartes is quite complex. Mathematics should not be the central science simply because it is the only science that conforms into something that is certain.Insofar as the statement “It’s not true if it’s not certain” is concerned, there is no way one can reach at something that is beyond probable and without dispute. This is because the method of doubt has no clear path to begin with. The path to certainty with the use of the method of doubt, ultimately leads to nowhere.