ARTHUR JAFA REFUSES TO BOW to the needy chorus, whose tired refrain (“What are you trying to say?”) is blind to the fact that his growing oeuvre is less concerned with producing another transcribable dissertation on the condition of the so-called Black body than with manipulating intermedial tensions between objecthood and subjecthood, articulation and comprehension, and functionality and signification. “Live Evil,” at the Luma Foundation in Arles, France, is the most comprehensive presentation of Jafa’s work to date, continuing his scrutiny of the oxymoron derived from Thelma Golden’s idea that