Watch the theory fail.
Sit a short diagnostic. Doxa infers the world you actually used, then runs it on questions you have not seen.
Eight answers contain a world.
01
Sit eight items.
Newtonian force. Local mark. The model is not in this loop.
02
One world from the pattern.
Doxa does not explain each miss. It names the theory that would have produced all of them.
03
Then the unseen paper.
Holdout items the world has not sat. If the theory is right, these fail on screen before you touch them.
04
The smallest change.
One intervention. The same holdout, again. Those failures should die.
Predicted
F1A box sliding at constant speed needs a force.
F2The heavier ball lands first.
F3Action-reaction cancel, so nothing moves.
After the repair
H1Held. Constant speed is zero net force.
H2Held. Mass drops out of the fall.
H3Held. The pair acts on two bodies.