This well known Charlie Parker bebop composition is famous for its long, challenging form and rapid chord changes. It also features an extended “Circle of 5ths” progression sometimes known as “Bird Changes.” These are a series of ii/V or secondary ii/V progressions that are also found in “Blues for Alice” and the tune “Bluesette.” For The Reality Book, saxophonist Geof Bradfield penned a brisk, challenging original contrafact entitled “Denial.” Steeped in bebop language, both the contrafact and the original require dexterity and skill on your axe. "Confirmation" is also a popular tune for jam sessions, auditions, and competitions.