If joffrey dies, then tommen will be heir to the throne. tommen is now heir to the throne, so joffrey have to have died. this argument takes the form of dilemma.
According to wellknown succession regulation in Westeros, Myrcella would be Tommen's inheritor as his ultimate surviving sibling.
Most of the deaths on Game of Thrones involved one individual killing another, but there were a couple exceptions. One of the most memorable got here at the quit of season 6, when Cersei Lannister blew up the Sept of Baelor and so horrified her son, King Tommen Baratheon, that he jumped out the Red Keep window to his death.
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