 The most natural way to understand a reasons-responsive theory is in terms of an agent’s responsiveness to reasons. To illustrate, suppose that Frank Zappa plays the banjo of his own free will. According to a reasons-responsive theory, his playing the banjo freely at that time requires that if, in at least some hypothetical cases, he had reason not to, then he would refrain from playing the banjo. For instance, if Jimi Hendrix were to have stepped into Frank’s recording studio and asked Frank to play his electric guitar, Frank would have wanted to make Jimi happy and thus would have gladly put his banjo aside and picked up his electric guitar. It seems, then, that for Frank to play the banjo of his own free will, Frank — the agent — must have regulative control and not merely guidance control over his playing. His freedom must consist partially in his ability to act upon alternatives.