what i have read on news sites the judge actually explicitly have declared that the court was not to even decide whether he is Satoshi or not, the court was not even supposed to estimate how much bitcoin he may or may not own.
this last part is actually part of my confusion specially since the court's decision was to order him to give "half" of what he owned but at the same time they don't specify how much is the total to give half of it!
That's exactly how faketoshi could be sent to jail potentially by refusing to tell the court how much he owns.
He could say that he is unable to tell but it is the court to decide the credibility of his words.