This is the right question, although I don't know if there is a happy answer. If we need ever more expensive experiments to learn anything, progress is going to

This is the right question, although I don't know if there is a happy answer. If we need ever more expensive experiments to learn anything, progress is going to become very slow. Maybe that's why there is so much math; math is cheap. And there is always the hope of coming up with something testable.