Iceland has managed to guess the complete sequence for all of its residents from SNPs
Does not compute.
You can "guess" some statistical averages for the whole population, but you cannot "guess" the complete sequence for any particular individual.
but you cannot "guess" the complete sequence for any particular individual.
Of course you can. If you have a giant complete pedigree for most or all of the population and you have SNPs or whole-genomes for a small fraction of the members, and especially if it's a highly homogenous population, then you can impute full genomes with varying but still-far-better-than-whole-population-base-rate accuracy for any particular entry (person) in the family tree. They're all highly correlated. This is no odder than noting that you can infer a lot about a p...
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