The Name of the Rose alternative creative solution for ending

Imagine an alternative creative solution for the mystery. Analyze the evidence and find a new resolution that takes into account all the signs, events and the cultural atmosphere of the novel (a thesis paper!).
This is in regards to the book The Name of the Rose by Umberto Eco. Please give me 5 pages of pure content. I do not need a cover page and please let it be original.

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