Fair enough. I will provide this for any reader here.
"A legal presumption is a conclusion based upon a particular set of facts, combined with established laws, logic or reasoning. It is a rule of law which allowing a court to assume a fact is true until it is rebutted by the greater weight (preponderance) of the evidence against it."
It certainly leaves open the possibility of a rebuttal if there becomes, into the future, a "preponderance" of evidence against that presumption.
