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Or, you know, again, just like when the theory said it was possible, but in practice it wasn't, the theory was just incomplete and failed to include some dimension.

It is not "possible" for one process to rewrite the memory of another process, but using the RowHammer exploit, which doesn't exist in the usual memory and process model, but exists in the practical CPU, you can do it.

This is an interesting case, because unlike a natural science model that tries to calculate reality and fails, like the Newtonian model failing to predict Mercury's motions, here the model comes first, and it is the hardware.that fails to implement it in practice.