Machiavelli's point is one of logic.
A necessary condition to be guilty of calunnia is that one provides false information.
Another necessary condition is that one must know that the information is false to be guilty of calunnia.
So Machiavelli's point is that he wasn't wrong because he stated the first fact and he just didn't state the second fact which he concedes is also true.
My rebuttal strictly about logic is formally correct, but basically its provocative form was just meant as a response to Randy N's verbal attitude. He puts in improper straw men, points falesely to non existing errors: I am annoyed by his method. The second fact is also true, this is known. But In my opinion that was not really just the point Randy N was making.
I think Machiavelli is wrong over all about this because:
1. The false accusation was too ambiguous to serve as the basis for a crime.
2. Even if one saw the false accusation as sufficiently clear to be the basis of a crime I think the conditions that it was made under prevent proof beyond a reasonable doubt of intent.
3. If he is hanging his argument that Knox is guilty of calunnia on what Knox wrote in her voluntary statements after the police interrogation he is just bizarrely wrong. Putting the best face on his argument, perhaps there is some sort of language issue here, but I have a hard time even seeing that. Knox is not guilty of calunnia in those statements because she doesn't say anything that can remotely be interpreted as a false accusation when the statements are considered as a whole by somebody that understands English.
1. In my opnion this is not correct. And it is not correct if referrrd to both the the main accusation documents, statement of 05:54 and the hand written note of 6th. The 05:54 is not entirely consistent, but definitely unambiguous about accusing Lumumba. About the hand written note, this is possibly even more insidious. It is ambiguous in the degree in which implicates Lumumba, as it is meant to be a kind of uncertain piece of evidence, a piece of evidence that doesn't lead to a conclusion of guilt against him. But it is definitely not ambiguous in its intent of being a piece of false evidence. It is a whole false testimony written voluntarily, which contains elements both against Lumumba and against Sollecito. Its value as false evidence is even more evident. Its value of false accusation is less clear, as to use your wording, but its value of false evidence, voluntarily deceitful, is more clear, which is what matters to the charge of calunnia.
2. The conditions under which it was made are defined by Amanda herself: she wrote the note voluntarily, on her own initiave, and gave it voluntarily to Rita Ficarra. She admitted to not having received pressure nor requests on redactig this memorandum.
3. I think that "when her statements are considered as a whole" is a bit a misleading condition. Her statements inequivocably are a series of false testimonies. The only possible questions in Amanda's defence, at this point, are only two: 1) if she released them voluntarily or not; 2) if she was sincere or she lied.
The 1) is ruled out by the conditions in which the memorandum was written, as she also admits, and by the lack of elements, since there is no report of coercing, no early complaint with clear statement that she lied because of intimidation or coercion (the only factual detail is the hitting twice on the head); and because she kept on claiming she actually still had memories about Patrick being in her home and killing Meredith. 2) the only possibility left to excuse her is that she was sincere and was suffeeing of a false memory syndrome. This, however, goes quite against anything credible for mamy reasons. Among them because she accused Patrick after just two hours of questioning (after she was told that Raffaele had withdrawn her alibi).
I also think Machiavelli's characterization of the law was misleading and it would have been simpler and reasonable for Machiavelli to just concede the point that the crime of calunnia requires knowledge that the accusation is false. But I suspect Machiavelli doesn't agree with that.
I absolutely agree on that the accusation must be knowingly false. A person commits calunnia only if knows the testimony is false.
Here, there is obviously a jurisprudence on what the verb "knows" means when referred to a calunnia. If I falsely accuse a passer by of being a crazy terror bomber, I cannot just bring in my defense the sole argument that I could not be sure for certainity that he was not a crazy terror bomber. The "who knows if...?" defence doesn't work. If by your best knowledge you don't have such incriminating information against a person and you don't relly believe him guilty, this, by jurisprudence, is considered as knowing the person is innocent.