It is possible to make mistakes, but it’s more fruitful to assume the real effects of policies that have been widely adopted for a long time.
Of course, mistakes are feasible, but “it is useful to assume that the actual effects were known and desired” for long-standing, broadly adopted policies. Of course, mistakes can happen, but “it is useful to assume that the actual effects were known and desired” for long-standing, broadly adopted policies.
It is possible to make mistakes, but it’s more fruitful to assume the real effects of policies that have been widely adopted for a long time.