Marny, they'll drill to the 19th then stop regardless of whether it is 2 holes or 6.
They ywill keep drilling each hole until they exit the mineralised zone, however long that takes.
Put it this way if they only drill 3 holes then you could take that as a good sign......unless the rig breaks down of course.
Plainsailing, I like your reasoning mate. I will be 57 eventually