I have no idea where it has been stated that results would be inadmissible in a Portuguese court per se, other than in blogs and TV pundit "experts". I see no reason why they couldn't be, but simply not submitted as conclusive evidence.
The 'inadmissible in a Portuguese court per se" was merely a question my brain invented.
Let me try this again, if you would be so kind.
What is the number of matches required within Portugal in order for it have any kind of validity in court?
If the FSS tried 20, found Madeleine had one duplicate, then 15 out of 19 sounds close (before anyone piles in, I mean in a superficial manner).
However, if Portugal's standard was 30, and Madeleine still had say, just the 1 duplicate, then 15 out of 29 sounds, at the same superficial level, as a waste of time.
That was the thinking behind my request for a cite.
Does Portugal test 15x2 all the time, or a sub-set thereof (pick any 10 from 15), and how far up the stats does it have to go to have any form of legal credibility?