Dave,
Jim's assertion that whoever thought etc. was proved wrong is unequivocal but it also happens to be correct.

Then you are both asserting unequivocally, that the government has no case!

Whoever thought that the result was final without Parliamentary consent was wrong and has been proved so by a court decision

The High Court gave its interpretation of the law, which the government disputes.
The Supreme Court has yet to decide whether, in their opinion, the interpretation was correct.
It is about interpretation, not "proof," and the final decision is not yet made.

I have no opinion at all, not ever having studied obscure and ancient constitutional laws. If I had to bet, I would bet they decide against the government but just a hunch and not based on law.