I would like to hear the answer to my question from a competent medical worker or the Ministry of Emergency Situations, supported by data on the maximum time spent in water, blood loss and temperatures critical for life, because about the fact that someone survived in such and such a year, each can say, but the question is specifically about the film.
This case is taken from the biography of a stern dude. He really survived, really went to take revenge. Only he didn't seem to kill anyone. Sorry. Then he was still killed in a fight with the Indians. An entertaining biography. Read it. The name of that daredevil is Hugh Glass.