Foucault's Pendulum
Source: https://archive.org/details/foucaultspendulu00umbe ↗
Full text: Internet Archive ↗
Three bored editors feed fragments of occult lore into a computer they call Abulafia and let it generate connections.
It obliges — plausible, coherent, endless links between templars and kabbalah and secret history — and out of the output they assemble "the Plan," a grand conspiracy they know they invented as a game.
Then the game gets loose: real believers take the Plan as revealed truth, and the fabrication turns lethal.
Eco's Abulafia is the most exact literary premonition we have of the generative model as false oracle — a machine that recombines a corpus into patterns so fluent that pattern-hungry humans mistake them for discovered knowledge.
The novel's whole argument, dramatized at the length of a life, is that plausibility is not evidence, and that a recombination engine will always hand you a connection if you want one.
For anyone tempted to treat model output or a synthetic interview as insight surfaced from the world rather than shuffled from the record, this is the cautionary epic.
Dense, erudite, and decades ahead of its moment.
Central argument
Eco's novel follows three publishing-house editors who, half in jest, use a personal computer named Abulafia to generate connections among the occult and conspiratorial texts that cross their desks. The recombined fragments cohere into 'the Plan,' an elaborate secret history the men know they fabricated — but the fabrication escapes them, taken as literal revealed truth by credulous believers, with fatal consequences. The book is a vast meditation on interpretation run amok: on how the human hunger for meaning, armed with a machine that endlessly recombines, manufactures conviction out of coincidence.
Critique
Foucault's Pendulum is famously demanding, dense with allusion, and slow to start; some readers find its erudition a wall and its irony cold. As a warning it is almost too on-the-nose in retrospect, and its 1980s computer is a modest prop rather than a real theory of machine cognition. But as a dramatization of the specific danger — that fluent recombination of a corpus produces limitless plausible patterns which humans reliably mistake for knowledge — it has no equal, and it anticipated the failure mode by decades.
Why it matters for product
Abulafia is the most exact literary premonition of the generative model as false oracle: a machine that recombines a corpus into coherent, seductive, and groundless patterns. For product leaders the novel is a parable about mistaking plausibility for evidence — precisely the error of treating model output or synthetic research as discovered insight about users or markets. Eco shows, at the length of a life, that a recombination engine will always give you a Plan, and that believing the Plan is where the real danger begins.