Its behaviour might counterfactually depend on factors which the experimenter did not vary and which did not naturally change over the course of the experiment.
until then the results will generally work in practice.
Doesn’t really contradict what I am saying. In theory, I am saying, you can’t exclude mysterious extra variables...but in practice that often doesn’t matter, as you are saying.
Keep reading, the post gets to that.
Doesn’t really contradict what I am saying. In theory, I am saying, you can’t exclude mysterious extra variables...but in practice that often doesn’t matter, as you are saying.