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)
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)