From, the linked paper: > This insight captures the essence of Quantum Darwin- ism: Only states that produce multiple informational off- spring – multiple impr

From, the linked paper: > This insight captures the essence of Quantum Darwin- ism: Only states that produce multiple informational off- spring – multiple imprints on the environment – can be found out from small fragments of E. The origin of the emergent classicality is then not just survival of the fittest states (the idea already captured by einselection), but their ability to “procreate”, to deposit multiple records – copies of themselves – throughout E Basically, quantum information is unknown. All possible classical states are mixed together. Once you measure it, it decoheres into a classical system, where all measurements are highly correlated -- some states exist, and others don't exist. A quantum coin flip is heads or tails on top, and tails or heads on bottom. But once you measure it, it all decoheres at once. You get a classical coin flip, that is hrads on top and tails on bottom, or vice versa. You can't get heads on top, and tails or heads on bottom unsettled for a second bit of information. The same message is written twice, on the top and the bottom of the coin. You can look at the top of coin or the bottom and get the same result. If the top of the coin melts, you can still read the result of the flip from the bottom.