Presence, Absence, and Hallucination is a performance, reading, and sound activation of space-time dimensions in order to pressurize modes and forms of reality (in its glitchy, elusive, shapeshifting capacity) as it is perceived, experienced, and documented—ecologically, historically, sociologically, philosophically, and ever more frequently using artificial intelligence. Three prose texts by Brenda Iijima act as reference points for a collaboration with sound artist Johann Diedrick that opens pathways and trace resonances into the prismatic densities of the past, present, and future.