Throughout his career, John Baldessari has defied formalist categories by working in a variety of media—creating films, videotapes, prints, photographs, texts, drawings, and multiple combinations of these. In his use of media imagery, Baldessari is a pioneer "image appropriator," and as such has had a profound impact on post-modern art production. Baldessari initially studied to be an art critic at the University of California, Berkeley during the mid 1950s, but growing dissatisfied with his studies, he turned to painting. Inspired by Dada and Surrealist literary and visual ideas, he began incorporating photographs, notes, texts, and fragments of conversation into his paintings. Baldessari remains fundamentally interested in de-mystifying artistic processes, and uses video to record his performances, which function as "deconstruction experiments." These illustrative exercises target prevailing assumptions about art and artists, focusing on the perception, language, and interpretation of artistic images. These demonstrations provide an introduction to the major preoccupations of Baldessari's work, and the linguistic and aesthetic philosophies that inform it.