Answer: Explanation:
I think, therefore I am or Cogito ergo sum was the conclusion the phylosopher René Descartes arrived after a process of meditation and some eliminaton in order to find evidence for existence. By the time he perceived that "I" (and ability to think) could be the starting point that would lead to other evidences, he no longer dreaded doubts because this is also a consequence of 'I think', and evidence that 'I am'.