"Primitive," because by any stretch of the imagination you don't really know how to play. Once you overcome this you and The Ear become your own teachers, and you might sit down and watch other people play, but nobody tells you where to put your thumb, nobody shows you sheet music, your knowledge of theory is broken and you piece together how this shit works bit by bit. No books, perhaps, but the big no no is No Teachers. They'll just fuck your head up trying to convince you that you shouldn't do certain things which by all primitive means you should try doing anyway. What matters for the primitive is the expression of the primitive. If you want to call it emotion I don't care, go ahead, nothing stops people from talking about the emotional content of Will Ackerman Yanni John Tesh Kenny G Mozart, why should you think twice about it. To quote Becket on this matter, "If we can't keep our genres more or less distinct, or extricate them from the confusion that has them where they are, we might as well go home and lay down." Go home and lay down with your guitar.
Fahey used the term primitive for a few reasons. One was to separate himself from those he considered volkists, primarily the Seeger family, but also other operators in the "Folk Revival", something he mistrusted and possibly despised. Fahey's roots were in white western music, not the blues or folk forms that he would work within during his acoustic career. He considered it a lie or at least a great misrepresentation to call music made by white middle class suburbanites "folk".
The term primitive was also brought in to draw the distiction between his folk and classical sources, because he was drawing from blues, classical and folk musics, as well as any other viable soundhole (the experimental, le avante guarde). Designated American because he used above all else American musical references in his compositions. He was not classical, he played variants of traditional fingerstyle on a steel string guitar, but he was not folk or blues, they were mearly part of his diet. He borrowed melodies and progressions from Vaughner and Gershwin, he covered rock ballads, he recorded sound collages, and he wrote/played/didhisthing occasionally in atonal and serial structures. The practice of his music was primitive in comparison to classical music, it existed on the same plane as folk and blues but did not evolve from a distinct enclosed culture. It had traditional ties but not traditional boundaries. It was primitive - because it was new, it was unruly, and it was uncivilized.
"Guitar," get a box, get a stick, tie string(s) from the base of the box to the end of the stick. Make music.