People say "RAMCOA" isn't possible.
These posts often include highly specific phrasing. One is: "programming new alters into a system isn't possible".
Let's ditch the RAMCOA part... I have some questions for you.
What do you consider programming to mean, in this context?
Are there applications of programming that are possible, in your opinion? Why / not?
I almost always see 'new' included in these statements. So, what of existing alters?
If we removed "new", does this change anything?
What do you consider an alter?
What of "fragments", "neurobiological states with affect"? Neurobiological: branch of the life sciences that deals with the anatomy, physiology, and pathology of the nervous system. States: A condition or mode of being, as with regard to circumstances. Affect: a particular type of emotion or mood, or a reaction, such as the expressions on someone's face, that shows they are feeling this.
Some children are raised to believe in multiple gods; some others, explicitly atheist. They may believe in regional folklore, like faeries, Santa, or Krampus.
Does something need to be 'possible' to influence how somebody acts? To what extent?