CONCEPT
The Immunological Self
Varela's reconception of the immune system not as a defense network detecting pregiven self/non-self categories but as an <em>autopoietic cognitive network</em> that enacts the distinction through its ongoing operational activity.
The immune system contains roughly two trillion cells distributed through the body — lymphocytes, macrophages, dendritic cells, natural killer cells — with no central coordinator, no command center, no master program. Yet collectively these cells perform every function classically attributed to cognition: they distinguish self from non-self, remember past threats, learn from new ones, adapt to novel pathogens, and maintain the organism's molecular identity against a constantly changing environment. Varela's radical thesis, developed primarily in the 1980s and published in papers including "Organism: A Meshwork of Selfless Selves" (1991), was that the immune system is not analogous to cognition — it is cognition, of a specifically autopoietic kind, occurring without consciousness, without representation, without anything resembling classical computation.
In The You On AI Field Guide
The dominant mid-twentieth-century model, developed by Frank Macfarlane Burnet, treated the immune system as a defense network operating on template-based recognition: each lymphocyte carries a receptor matching a specific antigen shape, like a lock matching a key; when a match occurs,
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