The document discusses various works related to concepts of individual identity, authorship, and the readymade. It begins by describing Ashley Bickerton's artwork Tormented Self-Portrait and Vincent Van Gogh's Self-Portrait with Bandaged Ear. It then discusses Marcel Duchamp's concept of the "readymade" and some of his works that exemplified this, such as Fountain and Bicycle Wheel. Later, it discusses Sherrie Levine's appropriation works that referenced photographs by Edward Weston and Walker Evans without their permission, questioning ideas of authorship and ownership.