Approxima are specialised androids created to mimic living human beings. So authentic is their impression that they are visually indistinguishable from their counterparts. The distinction between human and machine, alive and synthetic, is a line not easily drawn with the Approxima. The most notable and sophisticated feature of the Approxima is that they can operate with an AI intelligence or with a replica or a human-personality, enabling them to imitate a specific individual perfectly - not just in their appearance but also their behaviour. Approxima are occasionally referred to as a ‘Type 3 Android’ with the designation referring to the layers of the android's composition. The first represented by the human tissues, complete with a circulatory system, reliance on nutrients and oxygen carried by blood; the second, where the human and machine layers interface and the third by the underlying robotic skeleton.