An amazing programmer. It removes the birth date, birth place, marriage date, marriage place, and notes from living people. It has an option to change their given names to initials. All of the information in a family tree is subject to error, and anything I send out should be treated as a guide to further research, not the definitive word. The further back you go the more errors creep in.
People change the way they spell their names.
People, especially those who moved west, sometimes lied about why they came, where they came from, and what their last name was. As an example of how far you can take genealogy, a second cousin of mine who is retired and lives in Salt Lake City traced one branch of our family back to Charlemagne, Emperor of the West and King of the Franks. The chain depends on 1,200 years of record keeping, through fire, flood, the fury of the Norsemen and the Black Plague. In one place our royal blood depends on a lady who worked in a castle, came up pregnant without a husband, and told her parents it was the Duke. I told my kids not to give themselves airs.