The paper finds that: "These findings together with the trends revealed in long-term CGCM runs suggest that large-scale summer temperatures were some tenths of a degree Celsius warmer during Roman times than previously thought."
They aren't talking about 2 to 5 C warming, rather a few tenths of a degree.
The military runs on coffee. I used to wash raw coffee grounds down with a swig from my canteen on road marches (no hot water) when I was an infantryman. Plenty of people with non-desk jobs drink coffee, especially in colder climates. That's what Thermos bottles are for.
Veterans typically are only eligible for "free healthcare" if they are poor or disabled. For example, the income threshold for benefits around here is $30k/yr. Above that, VA typically won't even consider you. Below that, they might assuming you have a service-related disability, a Purple Heart, or served in "high risk" (e.g. Agent Orange) theaters; even then, the "healthcare" typically is focused on your service-related disability.
A veteran who is earning anything above around $15.00/hr isn't going to receive "free" health care.
Don't believe me? Here: http://www.va.gov/healthbenefits/
Disclaimer: I am a disabled combat vet. I haven't bothered applying for VA health benefits because my employer benefits are light-years better than anything VA could offer. I can also get in to see a doctor when I'm sick, as opposed to waiting a month or two for an appointment.
You've obviously never taken a real IQ test if you think it is all about "memorization of facts and conclusions". The primary objective is assessment of reasoning and cognitive ability. Analogies, puzzles, spatial reasoning.
The mere fact that these lab rats are allowing themselves to be continuously geolocated doesn't say much about their brains. I suspect the smarter people are busy working in the lab and don't need games to improve their "brain performance."
Add in two young kids and it gets even worse. Even so, 50k to 75k of debt for a STEM graduate degree isn't a big deal and pays for itself in a few years. Just skip a Volvo or BMW for ten years. No big deal.