Imagine n^3 EMF-generating cubes surrounded by 6n^2 EMF-detecting cubes. Starting from an initial given state, is there any n for which over time the state of a

Imagine n^3 EMF-generating cubes surrounded by 6n^2 EMF-detecting cubes. Starting from an initial given state, is there any n for which over time the state of any given EMF-generating cube cannot be deduced? Then consider a further constrained version in which the EMF-generating cubes may only generate EMF in response to external inputs, i.e. as in the game of life.