You, sir, are wrong, not matter how eloquently you try to frame your post. There is no proof or fact that Thomas Jefferson had children with Sally Hemmings.
I suggest you read further.
Keep in mind that Thomas was not the only Jefferson.
I'm aware of the controversy and of the emotions it stirs. However, as you can read yourselves in Monticello.org (http://www.monticello.org/site/plantation-and-slavery/sally-hemings), "...based on documentary, scientific, statistical, and oral history evidence, the Thomas Jefferson Foundation and most historians believe that, years after his wifes death, Thomas Jefferson was the father of the six children of Sally Hemings mentioned in Jefferson's records."
I'm not the only one who does accept Thomas Jefferson's paternity of Sally Hemmings' children as a fact, nor am I the most credentialed person who does either. If you still demand moral certainty on this issue, you must find the evidence that would lead me to see it your way with equal certainty.
~Theo