>> education
> uncommon, but then again, it's not like you find these
> things everyday.
What does that mean? What about education? Do you think education was uncommon for for the average person in the 19th century? Or do you think education was uncommon for for the average person in the 19th century with access to and ability to make notes in the margin of a book from 1504?
Well, literacy hasn't been all that common up until the past century (at least not the rates we see today), and it seems like the website is saying the book is from the 15 hundreds and the writing (might?) be from the 19th century.
Someone with access to a 300 year old book would probably be educated. The guy who writes temple OS is fairly educated too and if he had been around 300 years ago, someone might have put him in charge of some stuff like this, but just look at the kind of stuff he writes: https://news.ycombinator.com/threads?id=TempleOSV2
Some people who can do extraordinary things are also capable of having serious mental issues.
But I'm not saying I'm right or wrong, I'm just putting the idea out there.
I am not saying you are right or wrong either. I asked what you meant by "education: uncommon, but then again its not like you find these things everyday." After reading your response a couple times I can't figure out if you answered that question.
I interpreted it as "education not common, but incidents of this kind of indecipherable script aren't common either so it's plausible to have some kind of uncommon circumstances produce it"