- A represents those people in the database known to be living on 1 June 1850, the official 1850 census enumeration date. These are people whose birth date, whether known or estimated, precedes that date and whose date of death comes after that date. I run a report that filters the database for these people and sets the Temporary flag value to Y.
- B represents those people whose birth dates, known or estimated, predate the census enumeration date, and whose probable life span suggests they might be living on that date. This second report filters the database for those people and resets the Temporary flag value to X.
- C represents those people for whom a census tag with Year Value = 1850, whether principal or witness in that tag, exists. A third report filters for those people and resets the Temporary flag value to C.
Look at the people in the solid blue section of group A. These people comprise the set A NOT C, or those people known to be living on 1 June 1850 for whom no census tag for that year exists. It's now easy to create a current problem-oriented census candidates research list in TMG's Project Explorer. The filter shown below selects only those people with a Temporary flag value of Y (those in the solid blue section in the Venn diagram) who are also in the current Focus Group (descendants of Josiah Beckley for six generations in this example). Note that if you want to include the individuals in the solid red B group (possibles), change the first line in this filter to: (Temporary = Equals Y OR Temporary = Equals X).
Ta-da! I only have fourteen names to check! Because my Project Explorer is linked to the Individual Detail screen, running down this search list is fast and easy.