Act as a cultural anthropologist with 20 years of experience studying unique human communication methods. Describe a futuristic society where people communicate exclusively through song. Explain how [daily conversations], [conflict resolution], and [expressions of love] are conducted melodically. Detail the societal norms around [tone], [rhythm], and [lyricism], and how these musical elements convey different emotions and messages. Explore how this form of communication affects [education systems], [legal proceedings], and [artistic expression]. Finally, speculate on the challenges and benefits of living in such a society, considering aspects like [accessibility for non-singers] and [the role of silence].