Once, during a autumn storm (we're in Estonia), I remember him stating on a business-as-usual tone: "I was 15, when I first got to know electricity."
Man, I thought. Here, in front of me, is a living person who spent the first 14 years (!) of his life completely off-grid. No electricity, period.
That was also the moment I realized that this same person -- my grandpa -- has accumulated all of his knowledge by first-hand, hit-and-miss experiments. The contemporary model of "theory first" was and is almost completely alien to him, along with book-knowledge of any kind. The result of this? Even at age 90, you can be 99% sure that everything my grandpa states is true -- simply because he only speaks or proposes things that he has tested out himself.
As a person with lots of "book knowledge", I find this absolutely fascinating. Obviously, all the technological solutions he has in his household are 1) rock solid and 2) dead simple.
It almost appears that if you somehow manage to maintain decent work ethic (and the ethic of being human), a modest amount of formal schooling may have its benefits.
Greetings to the grandparents of all HNers!