Ignore solutions involving a gun to your head. - Sanjeev Singh

when popular wisdom is wrong --- for instance, when everyone was eating Margarine and you were eating butter. - Piaw Na

When you're dyslexic and are actually eating an ornamental fish? - Kevin Fox

I think it depends on your definition of 'crap'.... - Emily Miller

"If you eat this tablespoon of crap, I'll pay you $1 billion, and end all wars worldwide." - Stephen Mack

In general: when you believe chaos is stronger than causality, and your actions act more as a randomizing force than a link in the causal chain. For example, eating potato chips causes you to be gassy when you're at the bar and the hot chick decides to pass you by, but if she hadn't she would have married (and divorced) you for your money? - Kevin Fox

Fat has 9 calories per gram; proteins and carbs have 4 calories per gram. Eating more fat may make more sense if the weight of the food is a concern (and you have access to water, the weight of which would otherwise dominate). Say, a 6-month-long trip to the North Pole? - Tudor Bosman

And I do hope that you mean crap as in "junk food", and not as in 'fecal matter". - Tudor Bosman

crap as in "human manure" - Sanjeev Singh

I'm more interested in why you're asking the question? - Glenn Slaven

until yesterday, I never imagined it could possibly be good for you. - Sanjeev Singh

A similar question was answered (by a New Scientist reader) in their Q&A section ("The Last Word") last month. Look at the second answer on http://www.newscientist.com/article... - Tudor Bosman

Tudor, close! http://www.vegsoc.org/info... " A study has shown that a group of Iranian vegans obtained adequate B12 from unwashed vegetables which had been fertilised with human manure. Faecal contamination of vegetables and other plant foods can make a significant contribution to dietary needs, particularly in areas where hygiene standards may be low. This may be responsible for the lack of aneamia due to B12 deficiency in vegan communities in developing countries." - Sanjeev Singh

Thanks to the lousy design of the human body, gut bacteria produce B12 in the large intestine, beyond the point we can absorb it, unless we "close the loop". - Sanjeev Singh

Brian Robinson hiked the Triple Crown (PCT, CDT, and AT) in 300 days eating nothing but snickers bars and dried ramen to maintain hiis 6000 calorie a day regime. He did not gain or lose a single pound. http://royrobinson.homestead.com/Triple_... - Piaw Na

E.g. when you've turned into a fly http://en.wikipedia.org/wiki... - Philipp Lenssen