Pherdy, you sound very knowledgeable about the things I speak of. I agree,it remains questionable how guilty Fredo was. He seems to admit his guilt, like in the scenes in the sunroom at Lake Tahoe, he acts most damning at the club in Havana with the nude sex show, he runs from Michael, the Don, outside in the street at the start of the riot. This question of guilt interconnects with Michaels own guilt over his ordering Fredo's killing later in part III. Part of his pilgrimage for forgiveness to the Pope. This mystery is part of the lack of closure, the unresolved conflict, that part III provides inviting a Part IV.