Premise: "Broken Arrow" is a song written by Canadian singer-songwriter Neil Young and recorded by Buffalo Springfield on their 1967 album "Buffalo Springfield Again". It was recorded in August and September 1967 at Columbia Recording Studios and Sunset Sound Recorders. It incorporates musical ideas from "Down Down Down," a demo Young recorded with Buffalo Springfield (now available on the box set).
Hypothesis: Broken Arrow incorporates ideas first explored on a song called "Down Down Down."