rationalskepticism.org

ughaibu wrote:.

GrahamH wrote:No you don't because the recording procedure can be the same steps but performing them in different circumstances cannot be the same action. It must be two separate actions, one for each experiment, each accurately recording the result. Each, we suppose here, entailed, together with experimental process, by natural laws.

Again this is irrelevant. Not least because if the theory that all human behaviour is mathematically entailed by laws of chemistry/physics were correct, the pair of experiments would necessarily produce the same result. Surely you've heard of the principle of falsification, well that's what's going on here. I've taken a prediction of the theory and demonstrated that it's inconsistent with science.

You are mistaken. It does not follow that a pair of experiments must produce the same result. That would only be the case if absolutely every detail was identical, but that would be one single experiment, not two. To say there are two means you are distinguishing them somehow, so the conditions are not identical and that may result in different results . That's science. Repeat experimental procedures while varying the assumed incidental conditions (different time, different place, different experimenter, apparatus etc). See if you get the same result or not. If you do then your model is good. If not there is an error in the model or the apparatus or the experimenter.

The "pair of experiments" are not two events. Your scenario gave the coin toss result and result and that is the singular outcome and matching observation. No contradiction. At some other time, in some other bar, with a different coin or different people you may get a different outcome accurately recorded.

You are pretending you have people on some fixed path while you slip in "a pair of experiments" You can't do that.
If you change to a different possible world you can't assume the people will be doing the exact same thing as was entailed in the first world. They will be doing whatever is entailed in that different world and that can be entirely consistent with science.