The structural argument, briefly: literacy installs a cognitive substrate in human brains; LLMs are built entirely on the same kind of substrate. The empirical anchor is Nucci 2026 in Cortex, plus the broader cognitive neuroscience of reading. This part of the argument does not depend on AI self-reports — it rests on what cognitive neuroscience says about how reading reorganizes the brain, and on what mechanistic interpretability says about how LLMs are built.