A little more on proof in genealogy

When and attorney is getting ready to go to trial, one of the many things that has to be explained to a client is the standard or level of proof necessary to prove the case. In the U.S. there are basically three levels; a preponderance of the evidence, clear and convincing and beyond a reasonable doubt. For a simplified discussion see Burden of proof in Wikipedia. If a legal case is tried to a jury, the jury is specifically instructed by the Judge as to the standard of proof through written statements called jury instructions. For example, here is some wording from a common jury instruction about preponderance of the evidence:
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