Does anyone know what this means?  It's from the Family Tree DNA website and I have read it over several times. Refine your results with paper trail input The above numbers are based exclusively on the comparison of their Y-DNA results, which show 2 mismatches. However, these results can be refined if their paper trail indicates that no common ancestor between Norman Kincaide and Treasa Brookman could have lived in a certain number of past generations. If you don't know this information for a fact, do not change the "1" in the box in the next paragraph. However, if you have the information, please enter in the box and click on the recalculate button. What exactly does this mean: These results can be refined if their paper trail indicates that no common ancestor between Norman Kincaide and Treasa Brookman could have lived in a certain number of generations. And then: If you don't know this information for a fact (does this mean that the paper trail information does not show a common ancestor) do not change the "1" in the box.  Then there is: However, if you have the information, please enter in the box and click on the recalculate button. (Does this mean that if you are certain that Norman Kincaide & Treasa Brookman had a common ancestor 8 generations ago you enter that number in the box) The paper trail indicates that my John Kincaid who married Elizabeth Smith and her William Kincaid who married Elizabeth Glenn were the sons of John Kinkead who married Margaret Miles and died in Union Township, Erie County, PA in 1822. So my main question is: Does knowing that paper trail information increase the percentage of having a common ancestor or not? Sincerely Norman Kincaide