Anyone who has heard the summing-up in a murder trial will have heard the term "beyond reasonable doubt" explained: the judge says that "it means you are sure".
Little wonder that Kahui's defence team and supporters were angry at the coroner's conclusion. They had engaged in - and finally abandoned - a legal battle to stop the report being made public.
But Kahui's lawyer, Lorraine Smith, stated the obvious when she said the findings were "inconsistent with [Kahui's] acquittal". She is right at law, of course, but the coroner had already inserted that caveat into his finding.
It is impossible not to feel some sympathy in all this for the twins' mother, Macsyna King. Evans utterly exonerates her of any direct responsibility for the twins' deaths - he said there was "not a skerrick" of evidence that she was in the house on the evening in question. And she has doubtless blamed herself more often and more pointedly than anyone else ever could for leaving them in their father's care. But her tear-stained appearance on Campbell Live, orchestrated by the ponderously ingratiating host, veered uncomfortably close to beatification.
King lamented the public opprobrium she has endured as "torment and torture and horrible". Her lawyer, Marie Dyhrberg, spoke of the public reaction as a "mob mentality" and said we should "feel collectively ashamed of the way Macsyna King was treated".
She will find scant public support for the idea of national remorse. The extent to which Macsyna was tarred in the public mind was the direct result of Lorraine Smith's attempts to shift suspicion from Kahui to King. That is a perfectly legitimate legal tactic, which Dyhrberg herself would enthusiastically have adopted if she had been assigned the task of defending Kahui.
In any case, and notwithstanding the cruel comments King endured, the prevailing public mood was not a desire to stone her to death, but to see that someone was called to account for the killings. In the weeks and months following, the police inquiry was frustrated by a wall of silence behind which the family was hiding. At that stage, King was being interviewed at length by police but that fact was not made public, and even if it had been it would have made no difference to the public horror.
The tragic fact is that the horror remains. It is to be hoped that King feels some relief about her public exoneration, but that is of no consolation to the twins. More than eight years after their short lives ended, their souls cry out for justice. The week's events have, sadly, brought that no closer.