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I don't think so, if you could just read their conversation on early development of bitcoin you could sense they're two different people and besides I'm sure Satoshi or Hal wouldn't create alt account just for the sake of fooling us.
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Yes as i already said, he is/was a smart guy who know what could happening since the beginning... for me that possibility is more than possible, even most of the things in Hall life fit with the S.N. "life"... Obviously is just an oppinion.