Garage rock
Concerning authenticity in art, the European philosophers Jean Paul Sartre and Theodor Adorno held opposing views and opinions about jazz, a genre of American music; Sartre said jazz is authentic and Adorno said jazz is inauthentic. The subcultures of punk rock and Heavy metal music require artistic authenticity, lest a musician be labelled "poseur" for their perceived lack of authenticity (creative, musical, personal); likewise, artistic authenticity is integral to the genres of House music, Grunge, and Garage rock, Hip-hop, Techno, and show tunes. In every realm of human activity, authenticity extends the instructions of the Oracle: “Don’t merely know thyself — be thyself.”