I like the idea of digging deeper into counterfactuals at foundational levels. Science that has any use needs valid counterfactuals. It tells us that if we arra

I like the idea of digging deeper into counterfactuals at foundational levels. Science that has any use needs valid counterfactuals. It tells us that if we arrange stuff just like so, we can engineer things. Or that no matter what action we take, the heat death of the universe will happen. But counterfactuals and foundations don't mix easily, especially in QM where "what if I had measured X" isn't a really valid question in the standard view (the quantum zeno effect is an example of how hypothetical measurements and actual measurements aren't the same in QM).