This is what I'm saying, if the Johannine prologue were inspired by the prologues found in these later gnostic texts then the prologues in the later gnostic texts were survivals of something earlier that the gnostic texts themselves built around or incorporatedThe argument employed by Robinson to show that the Johannine Prologue depends on the Trimorphic Protennoia hinges on the manner in which motifs concentrated in the Prologue appear widely dispersed in the more detailed and elaborate mythical scheme of the Trimorphic Protennoia where they seem to find their "natural context." The Providence Monologue does not provide sufficient grounds for such an argument
I see no compelling argument to think the Trimorphic Protennoia is an expansion of the Providence monologue in Apoc. John especially since Turner flags the basic aretological monologue there as being the first/earliest layer - with the more gnostic elements as later
An alternative is that such monologues were the kind of source material for a variety of texts and we're seeing earlier survivals here
A classic example is found in the Origin of the World. Very gnostic yet it explicitly quotes an earlier work called 'the sacred book' and what is it? An aterological monologue
The apoc of John seems directly inspired by Eugnostos as well prior to the fall of Sophia
This combined with the rewriting of Eugnostos into the Sophia, come on, how much evidence do we need?!
The gnosticising process is on display right in front of our eyes from an earlier (sapiential? angelic? pneumatic?) base
I don't think the hypothesis of an earlier Jewish 'Sethian' existence is wrong though, it's just that there's evidence of a less dualistic alternative that's equally early if not earlier that had it's own standalone set of texts we see fragments and echoes of all over the place!