Coming from a systems background, I might have a higher tolerance for "implicit" actions. They're always there, and almost never covered in code, although your code depends on them to function.

But I think I understand your point. You can ask a neighbor to "run to the market to get bread and milk" and expect reasonable results -- but you'll need to be more explicit with a foreign visitor.

Rails optimizes for neighbors, but in fairness the phrasebook and guidebooks are excellent. :)