Trans-human essence

‘Trans-human essence’ is a term that can refer to what essentially makes a being still human. Some refer to this as the heart, or the brain, or the minimum amount of human DNA. In «The Ghost in the Shell» this is referred to as the ghost, which separates the cyborgs from the mere androids (robots).
Successful enough cyborgifcation has the result that people are basically physically immortal in relative terms. (See organisms which live indefinitely in Biology, referred to as immortal.) The being remains a human/posthuman/transhuman cyborg so long as she has this essence, essential matter or "ghost".
Views differ if the essence is merely material, or merely spiritual, or both. 
== Media ==
«Ghost in the Shell», 1995 animated film.
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* The trans-human; Essence; Soul; Transhumanism; Ghost; The ghost; Spiritual transhumanism
* Trans-human renewal; Trans-human birth
* Religious transhumanism; Spirit and matter; Name and form