Think of Solomonoff induction as trying to guess what prediction algorithm you should be using. Past observations tell how well various prediction algorithms would do. Then it’s suddenly not such a big assumption that the things it weights are mere algorithms. And whatever procedure you are actually using to predict the behavior of the black boxes, Solomonoff induction would beat, I expect (having math for this would be better).
Think of Solomonoff induction as trying to guess what prediction algorithm you should be using. Past observations tell how well various prediction algorithms would do. Then it’s suddenly not such a big assumption that the things it weights are mere algorithms. And whatever procedure you are actually using to predict the behavior of the black boxes, Solomonoff induction would beat, I expect (having math for this would be better).