As I have tried to explain to you, both Ms Knox and Mr Sollecito's position is that they were in each other's company at his flat. There is no equivocation on this matter. Mr Sollecito cannot be Ms Knox's alibi witness nor she his in any meaningful sense, because they were both arrested for the same crime, otherwise there would have been no trial.
Think about the Lumumba situation. They didn't try him and ask his witness to testify!!!! It's a meaningless thing at trial - it carries no weight. An alibi is a proof accepted of innocence. What do you think would happen? Put Mr Sollecito on the stand - ask him if he'll vouch for Ms Knox's whereabouts. He says "yes". And the judge says, "Right then! Trial over! Home you go!" This is not something that has never been an issue in the trial courts, as far as I am aware. Mr Sollecito testifying or not on this matter would have no bearing on the case. If either one or the other could have established an alibi by other means, then a different scenario would have been in play and evidence to that effect has been debated ad nauseum, with both defence teams trying to prove their respective clients were at Mr Sollecito's flat.
So, all your horrid little gossipy contentions about Mr Sollecito are predicated on rather stale thinking and a lack of understanding about what really matters when you are trying to clear yourself after a wrongful arrest, charge, trial and conviction. What you should be thinking about is that neither Ms Knox nor Mr Sollecito has ever testified against each other - there is meaning in that.
I ask you again: Are you under the impression that Mr Sollecito's position is that Ms Knox went out on the night of the murder?