Heh. High meat.
Well, I doubt that most of the things on here would allow people to live long term on them. Although I might be willing to try. 
Also, according to the NHS potatoes do contain molybdenum, just not as much as those that grow above ground. It looks like it depends on how much is in the soil.
But no one claimed you could live on the other things for any length of time at all, it was just picking your favourite for flavour's sake. However potatoes were said to be a good choice because you could live on potatoes with the addition of dairy without suffering the ill effects of malnutrition, so I thought I'd look it up (okay I was bored!)
Looking at it I also think it depends on the dairy as well as where the potatoes are grown, as yoghurt also has molybdenum in it due to fermentation, so with the small amounts in the potatoes grown in the right soil and the small amounts in yoghurt, maybe you could long term? It would be quite weird/dull though
Anyone seen Food Inc? It talks about the pink slime, and what I found more shocking the tiny amount of slaughter houses in the US and how refined this process had become over time and just how many cows you're probably eating in one burger. The most shocking thing I saw was the seed patenting and it's effect on nearby farmers.
I'm quite thankful I don't eat processed meat or shop in an American supermarket, where all the different brands of meat are basically coming from the same few slaughterhouses. We only get organic or free range meat at home, but I'm aware that that's often ecology unsound or probably not what I think I'm buying, it tastes better though and I like supporting local butchers wherever I can. Dunno. Complicated, I should do more research into where my food is coming from, I do try, but it's not always very clear.
