The Public Minister’s argument can be accepted only in part. It is indeed true that, even before the legal affirmation of the principle in question, conviction could be declared only when the evidence against [the defendant] was such as to overcome the presumption of innocence, which informs all of [the relevant] law (Article 27, 2nd paragraph of the Constitution, but for example also the last part of C.P.P. Article 527, 3rd paragraph), so that, even in the presence of evidence against the defendant [that was, however,] not wholly sufficient, or contradictory, the verdict had to be one of acquittal. But to assert that the reformulation of C.P.P. Article 533 via the insertion of the principle in question, effected by Article 5 of the law of February 20, 2006, no. 46, was an operation of “mere aesthetic surgery”, so to speak, seems to debase the profound significance of this principle, which, instead, the legislator wished to reaffirm.
Moreover, examination of the legislative history [lavori parlamentari] leading to the adoption [deliberazione] of the law of February 20, 2006, no. 46 reveals that this is a principle of legal culture [civiltà giuridica] widely accepted not only by (obviously) those who voted in favor of the law, but also by those who displayed their opposition, since they did not oppose it due to disagreement with the substance of the principle, but only due to opinions about legal methodology [valutazioni di tecnica normativa], believing that coordination problems between the new text of C.P.P. Article 533 and [the existing] C.P.P. Article 530 could arise.
The condition required by this law to arrive at a verdict of guilty does not, therefore, allow one to formulate a belief in terms of probability: that is, to issue a guilty verdict, it is not sufficient for the probability of the prosecution hypothesis to be greater than that of the defense hypothesis, even when the former is significantly larger [notevolmente più numerose]; but [rather] it is necessary that every explanation other than the prosecution hypothesis not be plausible at all, according to a criterion of reasonability. In any other case, acquittal of the defendant is required.