Mind/matter duality

[little_monkey]

Perhaps you are referring to Colbeck and Renner who have published a proof that any extension of quantum mechanical theory, whether using hidden variables or otherwise, cannot provide a more accurate prediction of outcomes. What they have argued is that even if one assumes that the wavefunction in QM represent reality, its future behavior cannot be predicted with certainty. This means that there is an inherent randomness in nature.

What if the hidden variable is really a hidden dimension? How would you be able to tell the difference, IF that dimension was itself part of a multi-dimension system?

There are a number of physicists who have stake their lives on that. They are not a bunch of happy troopers right now, as none of their predictions of certain classes of particles beyond the Standard Model have materialized in the 2 years the LHC has been in operation. In fact all those who have endeavored in Supersymmetry and String Theory are either in a depressing mood or in a denial mode, which is understandable if you have a few dozens of published articles, and now you begin to realize that your whole life's work might be in jeopardy.

Also, what does all this have to do with mind/matter duality?

I was just answering apophenia who was aking a specific question on QM.