I know this is very late to the party but I was looking to see if anyone else had twigged the correlation between the Flamespren experiments and Quantum physics so im gonna put my 2 pence here even though noone will see it
The spanreeds (as well as some of the fabrials listed in the addendum at the back of part 2) do indeed seem to act like a form of Quantum entanglement. though in a far more Macro way rather than the changing of individual quantum states.
As for the flamespren we seem to be looking at a demonstration of Heisenberg's Uncertainty Principle. When you have an experiment where Quantum propailities are involved (such as the size and shape of our little flamespren) then the act of measuring it collapses the proability waveform essentially removing probabilty from the equation (as it is now not probable but certain) thus changing the initial conditions and rendering the whole experiment invalid.
