[kjeksfjes]

Most kids don't go and become scientists – why on earth would saying that specifically about farm kids be biased? Also, isn't farming an occupation where it's more common to inherit it from your parents than for other occupations?

Also, why would not becoming scientists equal to being stupid? Kind of biased, hmm?

[mschuster91]

As described in a parallel comment: Farm kids mostly live in, well, rural areas (okay, there is a small percentage of farms in urban areas too...), which means that the chance of them obtaining higher education is provably lower than the chance that urban-area kids get.