Since folks seem to not recall prior articles about marissa mayer, I believe it's clearly mentioned elsewhere that she's one of those people who via medical accident/ virtue only need a substantially reduced amount of sleep compared with most people. The journalist for this article is clearly an idiot for neglecting that important contextual info.
"My day starts around 9 A.M. and meetings finish up around 8 P.M. After that I stay in the office to do action items and e-mail. I can get by on four to six hours of sleep. I pace myself by taking a week-long vacation every four months."
and thats just the first google result for "marissa mayer sleep"
Kind of an aside, but I find the requirement of providing proof in an argument to be pretty ambiguous in an age where Googling things is so darned easy.
Sure, I could find a link that gives the quantum dynamics of why water is wet when I use that fact in an argument... but do I really need to? These days, it seems that pushing back on people to provide easily knowable supporting information is just a delaying tactic or cognitive dissonance coping method... as in "Oops, I just read a really uncomfortable conclusion... I think I'll ask for proof then close this window before it's actually provided." :)
That Is all.