If these authors (of primary text) intend to make readers feel stupid, then today, they have succeeded.
I have reread it for the effing nth time and yet, there's nothing close to epiphany or gist or a popping yellow bulb above my head to say the least. Puch*! Makes me want to shake the ivory towers and see it crumble brick by brick!
Theories. Effing theories!
...........
Primary sources have been described as those sources closest to the origin of the information or idea under study.[1][2] Primary sources have been said to provide researchers with "direct, unmediated information about the object of study."[3] They may contain original research or new information not previously published elsewhere.[4] They have been distinguished from secondary sources, which often cite, comment on, or build upon primary sources.[5] They serve as an original source of information or new ideas about the topic. Primary and secondary, however, are relative terms, and any given source may be classified as primary or secondary, depending on how it is used.[6]
--lifted from wikipedia.com
Suwat na la'g balak, RV! :) 
