Thanks for your comment and the source for Pawlowski ++.
In relation to my essay, I'd like to be clear about this sweeping comment of yours; my edits shown thus [.]:
"You have to realise that not all elements of mathematical models are necessarily parts of the "real factual situation". What [some] people call "realism" is actually idealism. The [foolish] realists assume also the existence in reality of items which don't have to be there. Hidden variables. They're not just hidden - they are mathematical fictions!"
We agree. For I specifically define realism in terms of beables (things which exist, after Bell). Thus, from my essay, per paragraph 2.1.
"Taking care with analysis to ensure that no step here is negated by experiment, our approach - per Appendix A - is based on commonsense local realism (CLR).
Taking care with Nature, we hold a consequence of realism to be: 'at all times, the set of beables possessed by a system fully determines all relevant probabilities,' after Gisin (2014)."
So (in the quantum experiments Q1/2 and Q1 in my essay), λ and λ' -- correlated by the conservation of total angular momentum -- are termed "hidden beables" in that they cannot be known by us!
Bell (1976) suggested the term uncontrolled instead of "hidden" in that they cannot be manipulated at will by us. Either way, to be very clear: I certainly have neither use nor call for mathematical fictions.
With my thanks again; Gordon