Require that a CONFIDENCE level be included when adding a source to the Family Tree
FamilySearch should consider requiring a confidence level (high, medium, low) each time a source is added to the family tree. If implemented correctly this would help improve the accuracy of the tree. For example, if a user enters a birth date/place and cites a birth certificate as a source, that would be an example of high confidence. If they cite the person's death certificate that lists their birth year, that would be medium. Low confidence would be given to uncited sources like history books that can't be corraborated with other sources. Since everyone's definition of high, medium, and low will be different, take the guess work out of it by implementing a pop-up menu that has an extensive list & let the user choose the appropriate one. Once chosen the corresponding confidence level will be applied.
Then there are cases where websites such as find-a-grave are used as sources. That is okay provided a gravestone exists. However, it should be a medium confidence source, because it assumes that the stone mason spelled the name right and got the dates correct. In cases where a readable gravestone does not exist and/or a cemetery plot map doesn't show the person being buried there, find-a-grave should not be cited, but if it is, no higher than low confidence.
Then there is the special case when there are no direct sources exist and indirect sources combined with reasoning is used in an effort to fill in the blanks. One example of this can be seen in Memories for Sgt. Nathaniel Washburn (ID LHKN-L96) entitled "Strategy for locating Nathaniel Washburn's land and possibly his home - mill - and grave in Adams County, Ohio". In this case the pop-up menu would need to have an "Other" category and its confidence level would have to be established by someone at FamilySearch after reviewing the memory or other form of reasoning.
When viewing the list of sources attached to a record, color-coding each source (green = high confidence, yellow = medium confidence, red = low confidence, gray = undefined/tbd confidence) would be an additional enhancement.