Tengo made a point of asking people how old they were at the time of their first memory. For most people it was four or five. Three at the very earliest. A child had to be at least three to begin observing a surrounding scene with a degree of rationality. In the stage before that, everything registered as incomprehensible chaos. The world was a mushy bowl of loose gruel, lacking framework or handholds. It flowed past our open windows without forming memories in the brain.