It’s worth noting that minimising free energy – sensory prediction error – does not mean that a living system can get away with retreating into a dark and silent room and staying there, staring at the wall. You might think this would be an ideal strategy, since sensory inputs from the external environment will become highly predictable. But it is far from ideal. Over time, sensory inputs signalling other things, like levels of blood sugar and so on, will start to deviate from their
