Belief systems about hiding agents turn missing evidence into proof
Posit a schemer who is smart, powerful, and actively scrubbing the record, and you've built a theory that feeds on its own falsification. Evidence for the plot confirms it. No evidence confirms it harder, because of course they cleaned up. Counterevidence confirms it hardest of all: they planted that. Call it an epistemic black hole: a belief system you drift into on inferences that look locally reasonable, then can't think your way back out of, because the escape routes are exactly what the theory predicts the schemer would block.
The Pizzagate gunman is the clean demo. Edgar Welch raided Comet Ping Pong in 2016, rifle out, ready to free the trafficked kids. Found a pizzeria. Surrendered, recanted, said the ring didn't exist. His own forum concluded he was a paid actor sent by the Deep State to discredit them. Which is not insane given the premise: if the government stages false flags, one more staged gunman is a short hop.
The trap isn't a defect in the believer, it's load-bearing structure in the belief, and it self-assembles wherever a hidden deceiver gets posited. Freud's unconscious was exactly such an agent, motivated to stay hidden: no complex found meant resistance, a patient's rejection meant denial, acceptance meant resistance overcome. Early modern witch courts ran the same engine, reading demonic trickery into every alibi. Nobody engineers the seal. Posit the deceiver and it grows itself.
Source claim: Belief systems that posit intelligent agents deliberately evading detection predict the absence of evidence, and even the discovery of counterevidence, making them structurally immune to refutation.