Once upon a time, long ago and far away, there was an orphan feller from way out in the country ; a yokel with a Gibson J-200, a boom box dreadnought with only three frets ,way up at the cowboy end of the stick.
Real dumb I know (!!!!!!) , but this musically-challenged rustic claimed that was all he needed to be a real big songwriter.
Just three chords and the truth.