Bismarck

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As far as I've read the Bismarck was the best ship the German navy had during World War II and it was sunk in a naval battle in May 1941,that is what I have always considered the real account, but today I was having a discussion in a RPG I play and someone there said that what really sunk that day was a clone and the real one sunk in 1945. I googled it and could find nothing even near what he said. Has anyone ever heard this version of this event?