Cartesian doubt is the basis for Descartes' statement, ""Cogito ergo sum"" ("I think, therefore I am"). Methodological skepticism is distinguished from philosophical skepticism in that methodological skepticism is an approach that subjects all knowledge claims to scrutiny with the goal of sorting out true from false claims, whereas philosophical skepticism is an approach that questions the possibility of certain knowledge. Cartesian doubt is methodological. Its purpose is to use doubt as a route to certain knowledge by finding those things which could not be doubted. The fallibility of sense data in particular is a subject of Cartesian doubt. There are several interpretations
Ergo Proxy two DVD box collection on September 25, 2012 and August 22, 2012 respectively. In Australia and New Zealand, the "Ergo Proxy" DVDs were distributed by Madman Entertainment, the first volume released in March 2007. The first volume of "Ergo Proxy" was released in the UK by MVM Films on August 6, 2007. The English dub of "Ergo Proxy" aired on ABC2 (the national digital public television channel) from July 3, 2007 to December 4, 2007. In Canada, the English dub aired as part of Anime Current, an Anime Television block, on pay-TV digital channel G4 Canada from July 26, 2007