If art is a mirror, dreams are the back of the head. A work of art derives its effects from light, sound, and movement, but dreams unfurl in darkness, silence, paralysis. Like a recipe attempted in an ill-provisioned kitchen, “dreamlike” art relies on substitutions: dutch angles, forced perspective, absurdist juxtapositions, arbitrary transformations, and, as Peter Dinklage’s character points out in the film Living in Oblivion, a lamentable superabundance of dwarfs. Dreams in art either make sense, or they make no sense at all, but they never manage to do both at the same time, the way dreams do while we’re dreaming them.