N. Katherine Hayles’s Unthought argues that cognition must be radically detached from the privileged domain of human consciousness and redefined as a broader process distributed across human, biological, technical, and material systems. Her central proposition is that much of what enables perception, decision, adaptation, and meaning-making occurs through the cognitive nonconscious: a layer of processing inaccessible to introspection yet indispensable to conscious thought. Rather than treating consciousness as the sovereign centre of cognition, Hayles presents it as only one level within a wider ecology that includes unconscious processes, bodily perception, technical devices, artificial agents, plants, animals, and networked media. This shift challenges anthropocentric assumptions by showing that cognition is not limited to rational reflection or linguistic abstraction; it also appears in pattern recognition, environmental responsiveness, feedback loops, and adaptive behaviour. Her case studies range from human neural processing to plant signalling and computational systems, demonstrating that cognition emerges whenever information is interpreted in context and used to guide action. Particularly important is her concept of cognitive assemblages, where humans and technical systems operate together, as when smartphones, sensors, algorithms, networks, and users form temporary but consequential units of distributed cognition. In such assemblages, agency no longer belongs exclusively to the human subject; it circulates through relations among bodies, machines, codes, and environments. In conclusion, Hayles compels the humanities to rethink thought itself: beneath deliberate awareness lies an immense field of unthought cognition that structures contemporary life, from biological survival to digital infrastructures and planetary technosystems.
