ABSTRACT
Two rules of evidence are exceptionally useful for all witnesses, experts and otherwise. The first is the rule that allows the court to take judicial notice of facts. The great virtue of judicial notice is that, after judicial notice is taken, such facts are, from that point on in the case, assumed to be true. If there is a jury, the judge will turn to its members and say something like: “Ladies and gentlemen of the jury, I am telling you that in your deliberations in this case you must assume that the following fact is true.”
