The question is whether he would break the prediction. He can certainly imagine breaking it, in principle, but would he actually break it? That’s something that a thought experiment can’t possibly address. Since we don’t yet have any way of predicting human behaviour to the required extent, we can’t actually conduct the experiment.
Of course, the thought experiment is rubbish. It applies just as well to a deterministic computer program that prints “What will I print next?”, reads the input, and then print something else (e.g. by printing “Fooled you!” to anything except “Fooled you!”, to which it prints “Nope.”). Would Bryan argue that this program is not deterministic? I’m not a foolproof Bryan-predictor, but I’m going to predict “no”.
The question is whether he would break the prediction. He can certainly imagine breaking it, in principle, but would he actually break it? That’s something that a thought experiment can’t possibly address. Since we don’t yet have any way of predicting human behaviour to the required extent, we can’t actually conduct the experiment.
Of course, the thought experiment is rubbish. It applies just as well to a deterministic computer program that prints “What will I print next?”, reads the input, and then print something else (e.g. by printing “Fooled you!” to anything except “Fooled you!”, to which it prints “Nope.”). Would Bryan argue that this program is not deterministic? I’m not a foolproof Bryan-predictor, but I’m going to predict “no”.