Will there ever be an example where we are given a question that doesn't have a clearly outlined conditional indicator? As it was mentioned before, the list of indicators provided was over-inclusive and under-inclusive. In this case, how do we identify which is necessary (Group 2) and which is sufficient (Group 1) without the help of an identifier on our list?

Correct me if I'm wrong, but this is my understanding:

If you are in the Empire State Building, it belongs to the subset of NYC and is sufficient for membership in the superset of the USA. However, this is not necessary because you can belong to the superset but not the subset (Grand Canyon)

Belonging to the Superset (USA) is a necessary condition for membership in the subset (NYC), but the Eiffel Tower is not ‘sufficiently’ eligible for membership in the subset since it does not belong to the superset.