The knit cap is simply to point out the ridiculousness of the problem. Breast-feeding is a common issue where there is the "intuitive sense" but it's really a

The knit cap is simply to point out the ridiculousness of the problem. Breast-feeding is a common issue where there is the "intuitive sense" but it's really a "just-so story." There's "well, it's just common sense" theories that turned out to be useless when studied by smart people that weren't blinded by "well of course we will find some effect from this" bias. Seriously, compare the life outcomes of single-parent households by breaking out the reasons for single-parenthood. http://www.clasp.org/resources-and-publications/states/0086.pdf http://www.clasp.org/resources-and-publications/states/0086.... There is a lot more going on than "no dad -> sucky results." Zuck needs to figure out what the real causes are before pouring another $100,000,000 down the drain.