This idea is probably hard to notice at first, since it requires recognizing that a future with a fixed definition can still be controlled by other things with fixed definitions (you don’t need to replace the question in order to control its answer). So even if a “predictor” doesn’t “act”, it still does determine facts that control other facts, and anything that we’d call intelligent cares about certain facts. For a predictor, this would be the fact that its prediction is accurate, and this fact could conceivably be controlled by its predictions, or even by some internal calculations not visible to its builders. With acausal control, air-tight isolation is more difficult.
This idea is probably hard to notice at first, since it requires recognizing that a future with a fixed definition can still be controlled by other things with fixed definitions (you don’t need to replace the question in order to control its answer). So even if a “predictor” doesn’t “act”, it still does determine facts that control other facts, and anything that we’d call intelligent cares about certain facts. For a predictor, this would be the fact that its prediction is accurate, and this fact could conceivably be controlled by its predictions, or even by some internal calculations not visible to its builders. With acausal control, air-tight isolation is more difficult.