One of the reasons I believe the oral argument by Bongiorno were for show and not the dough is what was reported:
At-the-scene: Gavin Lee, BBC News, Rome
A fascinating part of the latest developments in this eight-year long case, is the language being deployed by the defence council. Imagery is being evoked, and characteristics of fictional characters are being drawn upon, superimposed even, on the defendants.
Giulia Bongiorno, the defence lawyer for Raffaele Sollecito, spoke for almost two hours ahead of the judgement this morning, as she attempted to pick apart the prosecution.
She described Sollecito as "pure", "innocent", and as a "Forrest Gump" character, an unwitting victim caught up in events around him. He, sitting directly behind his lawyer, gnawed his fingernails throughout.
This is the lawyer who once compared Amanda Knox to Jessica Rabbit, paraphrasing the cartoon's famous line, and arguing that Knox was "not bad... just drawn that way".
Again, rhetoric and carefully-picked imagery is being used to paint a picture of a defendant's simplicity and goodness, in this latest bid to portray his innocence.
The Italian SC doesn't do what ours does in that it isn't the constitutional court for Italy. Numbers you have a better handle on this so please correct me but I don't think the ISC makes the sort legal interpretations the US SC does and they evaluate evidence and how the lower courts used evidence whereas the US SC is focused on what laws or the Constitution mean.
I do not believe Bongiorno argued the law but rather the facts,
Numbers did the SC question the attorneys to clarify points they had made in the written appeals?