Have we checked for extraterrestrial influnce? Seriously it is Larry Niven's straight out of the Known Space's series Puppeteer plot. In all seriousness it wor

Have we checked for extraterrestrial influnce? Seriously it is Larry Niven's straight out of the Known Space's series Puppeteer plot. In all seriousness it works well if you have a pool sufficiently quality homogenous but would tend towards the mean of the pool.