One of the main, (if not the main) plot mechanics in Altered Carbon is that the consciousness/memories of people can recorded by the cortical stacks installed in the cervical part of their spines. This facilitates transferring of a person's consciousness to a new sleeve.

But how does the re-sleeving process work? If the stack simply records a person's "state" then the sleeve's biological brain is still performing all the actions (like moving/thinking/remembering etc.). So that when you insert a stack into a pre-owned sleeve, the consciousness it contains should be at odds with the sleeve's existing biological consciousness.

Or does the re-sleeving process imply some sort of mind-wipe/mind-overlay/mind-reboot of the sleeve's brain?

Alternatively, if the stack is doing the driving - what is left for the higher functions of the sleeve's brain to do?


In Altered carbon, the human bodies are referred to as "Sleeves" and the process of transferring one's consciousness to another body is called "re-sleeving" (as you clearly mentioned).

According to the Alter Carbon wikia site (here):

The mind is no longer fixed to the body, because the stack contains the human mind. The mind (the DHF) can be transferred via “needlecasting” to any other stack in any other sleeve, provided that the stack is wiped before the transfer.

The sleeve you are born into is called your “birth sleeve.”

When a sleeve dies, but the stack is still intact, this is called “sleeve death.” It is not fatal to the mind, only the body.

So, the stack simply doesn't record human actions, IT LITERALLY RECORDS EVERYTHING. Then the re-sleeving is done by first wiping the sleeve's stack and then transferring the consciousness from the person's stack into the sleeve's stack.

But on the downside,

The human mind is biologically evolved to stay within the body into which it was born. If a person is resleeved too many times, the mind will rebel, and the personality starts to fragment. In short, resleeve into too many different bodies, too many times, and you go insane.

If a person resleeves into their own biological body over and over, however, there is no personality frag.

This is why Meths grow clones to resleeve into; they can live forever without any personality degradation or fragmentation.

And finally about : what is left for the higher functions of the sleeve's brain to do?. According to the book, :

Cortical stacks serve as a receptacle for the human consciousness or Digital Human Freight (DHF).

In simple terms, they are like recorders; they take note of everything that happens. But still the brain of the sleeve is responsible for the sleeve's functionality. Take for example the action of thinking. The brain thinks, but the sleeve 'records' what the brain thinks. And all higher order functionalities are done by the brain. This is why rich people (who cannot afford clone re-sleeving) buy the sleeves that have great skills (like the one Bancroft acquired for Kovachs).

  • This still leaves open the question of how you convince a biological brain that it is no longer needed as a container for a mind, and that what happens to the existing mind when the stack is re-written? EG When Ortega shoved her grandmother into the sleeve of the guy who had been arrested. The only way I can reconcile this is if the mind part of the brain has been genetically edited out. – Peter M Feb 15 '18 at 16:57
  • @PeterM First you're going to have to figure out what a mind is... – TGnat Feb 15 '18 at 18:00
  • @TGnat I don't have to know what a mind is. I just need to know that evolution has built a handy dandy widget that already connects a single mind with a body (we call it a brain). But the cortical stack seems to be doing a and end-run around this widget with a second mind. – Peter M Feb 15 '18 at 18:20
  • @PeterM are you seeking scientific, real-life-compliant explanation? – Kreiri Feb 15 '18 at 19:53
  • @PeterM My answer was based on the TV series' information available. If you're looking for a scientific answer, i'm afraid i can't help you. – Shreedhar Feb 15 '18 at 21:35

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