One of the most extraordinary online essays on the subject of Duchamp — in or outside the precincts of ToutFait.com — is Yakov Rabinovich’s "Duchamp: To Say the Least." From silent comedy to the arch negations of Voltaire (and wheeling back again), this study of how Duchamp’s career intersects with all our ancien regimes is both exquisitely playful and essential all at once.