I think this is another example of why we must start with apriori approach to economics (and all learning for that matter) and only resort to posteriori methods

I think this is another example of why we must start with apriori approach to economics (and all learning for that matter) and only resort to posteriori methods as a secondary methodology. In this case we can prove logically that inflation reduces the investment capital available and that will always result in a decrease of production. If that is accepted arguing about how bad we can make something before X milestone seems a little less important.