Why? Which bit?
My understanding is that some of the so-called "proven facts" were true (Madeleine's DOB, etc.). A few others were disputed (from memory, some of the alleged revenue streams), but other points weren't allowed to be disputed (e.g., what the dogs actually reacted to), as disputing the veracity of what was in the files would have been the remit of a criminal trial, not the civil case for damages.
If my understanding is correct, if there had been "expert" testimony /a report
in the files up until Amaral got booted to the effect that the parents had established a cloning factory on Jupiter, then that assertion, could - in theory - have made the "proven fact" list for the purposes of the civil court case (based on the files established until Amaral was removed).
It couldn't have been disputed and was therefore officially undisputed... but that doesn't make the assertion true, only that it was recorded in the files up until his departure and was therefore not a total invention by Amaral.
The fact that Eddie would also alert to the scent of blood from a living human being appears to have only been established post-Amaral.
IMO, the dogs aren't the only issue.