In order to enable dynamic, spontaneous and unplanned event to take place the city must leave places with no firm restrictions or obvious codes that  characterize this places. we argue that a city built as solid state with no random and and unintended vibration could not reflect the  more sudden faces of society. As the built Environment is a long term process that could not account for the dynamic movements in the fabric of society, Therefore the built environment must leave loose ends to enable the more intricate reflection of it's inhabitants.