Rob and FG,
I stated it incorrectly. I reread the post that had parenthses around the ind/bobber part concerning the top fly. If I am fishing a larger fly in season (ie golden stone in early July), I will use it as an indicator certainly, but because it is a fly that should catch fish on its own merit, I do not consider it an "indicator" alone. I got a little turned around there. How about this definition, the top fly (if in season) is not solely an indicator, though it can be used for that purpose. Therefore, it is only an indicator when the fish eats the nymph, but overall it is a fly... hopefully a successful fly.