And who would be arbiter of what is accurate and what is not. People who happily had another's tree would not care. My advice: use other trees as a guide only and do your own research. One of my gg grandfathers had a very common name in Tennessee. In 1850 there were at least 3 of the same name, nearly the same age and all 3 born in the same state. No one could say which one was my gg grandfather unless they knew which son was my great grandfather-this fact I knew from my 90 year old father who knew who his grandfather's name. No program would be able to gauge the accuracy of that.