Cannibalism is presumably forbidden under Jewish law. However, cannibalism is permitted in order to save ones life provided the other person is already deceased (There is no justification to murder in order to save one's own life).
So suppose one is stuck on a deserted island with two people, one Jewish, and the other a gentile. If, G-d forbid, both of them died and one were forced to become a cannibal to survive, which person is more preferable to eat, the Jew or the gentile?
I am looking specifically sourced based answers
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