Does your positive fact make sense historically?

When doing genealogy and you are POSITIVE of a fact, before you go about demanding that everyone listen to you perhaps you should double check that the fact makes sense historically.  If you say that you know that all family members are buried in Nebraska including those that died in the 1750's.  Unless they are Native American's that statement is false.  The west was not explored west of the Appalachians until after  the American Revolution.  Even the early traders didn't go in to French lands.  Make sure that the history matches up before demanding, because if it doesn't you will be made a fool.  One of the great websites for that is http://publications.newberry.org/ahcbp/.  This website shows the development of counties in states over time.