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An Argo, in an article we read, is a boat that was completely replaced: "Argo is an object with no other cause than its name, with no other identity than its form." I have been told that the human body is an Argo, that it replaces all its cells every 7 years, we are only structure, pattern. Current evidence says this is not true, some matter remains: "About the only pieces of the body that last a lifetime, on present evidence, seem to be the neurons of the cerebral cortex, the inner lens cells of the eye and perhaps the muscle cells of the heart."