BIB - that's exactly how I understand it too.
I think what most people don't understand is the difference between evidential burden, and the overall burden of the case.
The Burden of proof is always with prosecution.
But in practical terms of case management, there is nearly always evidential burden on the accused.
So for example, Roux can simply make the contention that OP screams like a woman - and that was who the witness heard. The accused does not have to give evidence, and the defence can simply sit back and let the prosecution do all the work.
However that amounts to little more than wild speculation - and does not introduce any facts upon which the Court could make such a finding.
Roux skillfully navigated the dangerous waters in this area.
For whatever reason - he never introduced any direct evidence that OP screams like a woman - even though the defence had the opportunity to create such evidence.
Rather he introduced expert evidence that it might be possible to confuse the two. This is basically the 'muddy the waters" approach.
However it still isn't really evidence OP screamed like a woman - just raising the idea that it can be possible (critical step!)
The key evidence that it was OP screaming and not Reeva is OPs evidence.
In the end it was always going to be critical that the Judge believed OP and not Stipps.
Now this is where some reading between the lines can be done. And I think it explains some of the undisguised fury in the State's Appeal.
Many times a judge sets sail for the outcome they believe is the right outcome.
Personally I don't think Masipa really believed OP either. She even says he was lying (but not guilty of murder). She found his version was a real possibility that the state had not excluded. But she did not go so far as to say she believed what he told the court.
I think she really believes that something went down in the "accident" category, were manslaughter was the right verdict.
But having read her judgement many times - she does seem to say that she doesn't believe what he said about how this all might have come to pass. All the fans etc. She didn't buy it.
But to her it doesn't matter.
It reminds me of the "little old lady" cases where the judge "pulls the verdict out of their arse"