In terms of specific understanding relating to how the brain physically functions, I believe a tulpa is a set of processes similar to the host, using underlying functions relating to semantic/procedural memory and automatic sensation processing.
3:18 AM
Obviously there is also overlap in terms of emotions as a result of hormones as well.
3:18 AM
I'm afraid I don't know enough about neuroscience to specify beyond that accurately.
I, or Skye, frequently go 'inactive' depending on whether or not we are interested in what the other is doing, depending on who is currently using the body.
Enough that we can have discrete thoughts, aspirations, interactions and relationships with other people, and that we can directly communicate at the will of either of us, yes.
3:20 AM
There is not 100% separation, nor should there be.
Tulpas/hosts, when in a non-front state can, if given enough mental processing power, think a bit on their own in the background, but not very much from what I’ve heard. Also, the line between two personality processes is pretty damn blurry
My points aren't contingent on having entirely separate and constant thoughts, or "parallel processing" to the point of being able to deal with, say, mathematical problems.
I would, in fact, say that having those separated thoughts/desires/aspirations/etc along with the capability to use the body to interact with others - that does make a tulpa and host 'people' rather than one 'person'.
But, more importantly - none of what you have said pushes out the importance of using morality in terms of a host interacting with a tulpa - and vice versa.
...then why on earth would you try to explain things to 'original identities' in such a way as to indicate they can and should treat a tulpa however they want, and to consider it to have no consequence whatsoever?
if I were in the case that, within my own head, I wanted to commit egocide, I don't think it would be something you should bother with beyond concern of my mental health
{I still think of it as something of consequence though. Time for complex philosophical nonsense. While I’m not a full person, and nor is Zoey, I’m an integral part of how our shared mental processes function these days}
I am saying that the mechanics of morality within a person's mind, when dealing with the identities they form and act around, are different than the mechanics of morality between minds
If each 'original identity' is merely an extension of the underlying 'framework-person', then treating the other identities with respect and consideration and morality is the same as the framework treating itself with those same values.