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-- part contents for background part 22
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NOTE:  with the advent of chaos we recognise "noise" to be the unpredictability of determinstic but chaotic dynamics which either are a result:
• of very high dimensional chaos which we cannot understand (e.g. fluid turbulence);
or
• of chaos which develops very rapidly (large Lyapunov exponent) when compared with the experimental time-scales (e.g.  throwing dice or tossing a coin).