Descartes is a renowned name that is recognized by many as the father of current philosophy. He was also an accomplished mathematician and meta-physician. In his first meditation, he began with the method of distrust, questioning almost everything. In the beginning of his first meditation, Descartes tries to cast doubts on all his experimental views with a single stroke. See more at: http://www.customwritingservice.org/blog/descartes-method-of-universal-doubt-in-the-first-meditation/