Blue mark on the user account that made the tweet don’t have anything to prove, because anyone can get blue mark with just a payment of few dollars. Even if the account of Satoshi which is on this forum is to come online today if not that it’s has been locked for security reasons. If it comes online today and make any claim that he is Satoshi, they will still want some prove and not just a typed tweet or word on this forum, something should be used to verify the authenticity of the information. I believed their are few people who are here who have come a one on one comment encounter with the real Satoshi and they can also identify how he writes and communicate to some point.