If you have some limited computational model (e.g. n-th order Markov Chains), you can diagonalize over it in an expanded computational model (e.g. general computation) to get a sequence that is unpredictable in the narrower model.
If you have some limited computational model (e.g. n-th order Markov Chains), you can diagonalize over it in an expanded computational model (e.g. general computation) to get a sequence that is unpredictable in the narrower model.