Thinking in Signs: Peirce, Derrida, and the Semiotics of AI

The Beginning of Symbolic Thought. AI art Introduction It is often assumed that AI models, unlike human beings, are severed from the real world. They deal only in symbols, without any access to perception, experience, or meaning. This view, however, rests on a questionable assumption: that humans themselves enjoy unmediated access to reality. Charles Sanders Peirce explicitly challenges this. In his words, “We think only in signs” (Peirce, CP 5.265). For both humans and machines, access to the world is always mediated through signs. The key difference lies not in whether signs are used, but in what kind and from where they are drawn. In this article, I argue that artificial intelligences participate in a sign-based process structurally analogous to that of human thought. Peirce’s theory offers a powerful framework to understand this. While machines operate on symbols produced by human reasoning—books, speeches, libraries—these are not devoid of meaning. They are, in fact, the cu...