In Under Blue Cup, Rosalind Krauss explores the relation of aesthetic mediums to memory--her own memory having been severely tested by a ruptured aneurysm that temporarily washed away much of her short-term memory. (The title, Under Blue Cup, comes from the legend on a flash card she used as a mnemonic tool during cognitive therapy.) Krauss emphasizes the medium as a form of remembering, contemporary artists in what she terms the "post-medium" condition reject that scaffolding. Krauss explains the historical emergence of the post-medium condition and describes alternatives to its aesthetic meaninglessness, examining works by "knights of the medium"--contemporary artists who extend the life of the specific medium. These artists--including Ed Ruscha, William Kentridge, Sophie Calle, Harun Farocki, Christian Marclay, and James Coleman--reinstate the recursive rules of a modernist medium by inventing what Krauss terms new technical supports, battling the aesthetic meaninglessness of the post-medium condition.