The development of humanity’s philosophical thought is inseparable from the life and work of Rene Descartes. This French philosopher made a major contribution to the field, and one of the key elements of his work comprised the indubitable truth. To him, this concept was one of the pillars of the complete understanding of the universe. Consequently, Descartes engaged in a relentless search of the indubitable truth that cannot and shall not be doubted. The key philosophical question included the very existence of such a truth. These ideas prompted the development of the foundationalist epistemology, outlining the primary direction of Descartes’ subsequent work. To detect the presence or the absence of an indubitable truth, the philosopher relied on the reverse approach. In other words, the pursuit of the unquestionable implied that everything should be questioned. For example, the very nature of the reality became subject to Descartes’ criticism in an attempt to separate dreams from reality.
Overall, this direction of philosophical research underlines the idea that one is to become a skeptic to beat skepticism. At any given moment, each person may ask themselves if the world around them is real. Furthermore, separating dreams from reality is a highly subjective experience, according to Rene Descartes. Thus, one can never be certain whether they are in a dream or reality. Even the mere fact of the physical existence is not an indubitable truth. At the same time, Descartes eventually concluded that, in his philosophy, there was one aspect that had remained constant. At all stages of the way, the thinking self is present in the human activity: “I think, therefore I am.” Even though the physical side of life is not guaranteed, its philosophical aspect is unquestionable. Ultimately, Rene Descartes accomplished his mission, and the presence of the thinking self has become his indubitable truth. Moreover, he did not only succeed but also laid the profound foundation for the future development of the world’s philosophical thought.