PERSON
Susanne Langer
The logician-turned-philosopher of mind who established that human beings operate through two irreducibly different symbolic modes—discursive and presentational—and whose framework has become the most precise instrument available for understanding what artificial intelligence can do fluently and what it structurally cannot do at all.
Susanne Katherina Langer trained as a logician under
Alfred North Whitehead at Radcliffe, spent decades at Connecticut College and Columbia University, and applied the tools of formal analysis to the territory that logic had written off as mere emotion. Her foundational insight, developed across
Philosophy in a New Key (1942),
Feeling and Form (1953), and the three-volume
Mind: An Essay on Human Feeling, was that human beings operate through two irreducibly different symbolic modes.
Discursive symbolism—the mode of language, logic, and code—is sequential, decomposable, and rule-governed. Presentational symbolism—the mode of music, visual art, and felt experience—is simultaneous, holistic, and meaningful as a whole.
Large language models operate entirely within the discursive mode: processing and producing sequential tokens with unprecedented fluency.
The felt sense of whether an artifact is right, the intuition that a design works, the evaluation of whether a collaboratively built form embodies its intended meaning or merely approximates it—these