Cogito ergo sum. Scholars would recognize this issue of high debates even today, almost five hundred years after the words were uttered; though in the present most people in the world wouldn't understand what it refers to. In 1641, René Descartes published his "Meditations on First Philosophy," in which his first meditation dismisses everything that he perceives as reality and posits that he is nothing more than a disembodied brain being manipulated by …showed first 75 words of 1167 total…

…showed last 75 words of 1167 total…not included in this definition is brain density; no matter how dense it is, the brain will produce the same thought processes and consequently not exist. Descartes is ultimately wrong in his conclusion that thought and contemplation of existence proves existence. In that case, what is existence? Existence occurs when a ripple is formed to change an environment, and therefore close to everything has existence of some kind, if only primary ripple effects are observed.