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A comment on Show HN: Satoshi9000 analog BTC key generator (mechanical). Parent comment
There is only one coin, flipped _twice_; not a running occurrence, but in couples, perfectly simulating two coins functionally.
Once a literal couple of coins result in a XOR'd result eventually, no matter how biased - they differ - the exact ordinality of which will be random.
Two sides to a coin, no matter how random, still half the chance.
(for lurkers cringing at my subtle mis-understanding)
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There is only one coin, flipped _twice_; not a running occurrence, but in couples, perfectly simulating two coins functionally.
Once a literal couple of coins result in a XOR'd result eventually, no matter how biased - they differ - the exact ordinality of which will be random.
Two sides to a coin, no matter how random, still half the chance.
(for lurkers cringing at my subtle mis-understanding)