Glitchy achievements: An Extraordinary Man (Complete Encyclopedia of the Common Man). Patch has fixed the glitch, unless you had already scanned every activity for whichever group of people you had glitched. So some people will still have to start a new playthrough to gain this on another save file.
actually the patch fixed this for me
it was the farmers
i had not played for a while
and started up the game yesterday
and the first thing it did after the game loaded was to give me the achievment