This series comprised six lectures on music, which cumulatively took the title of a work by Charles Ives, The Unanswered Question. Bernstein drew analogies to other disciplines, such as poetry, aesthetics, and especially linguistics, hoping to make these lectures accessible to an audience with limited or no musical experience, while maintaining an intelligent level of discourse: Bernstein provides two distinct meanings of the term ambiguity. The first is "doubtful or uncertain" and the second, "capable of being understood in two or more possible senses"