I had a planned internet outage while the company upgraded the whole neighborhood followed by an unplanned outage when there was a glitch in the upgrade. I thus tested what happens when you were on the internet when you started you session but are no longer connected. The precise search behaves quite nicely, informing you that not all expected results were received. The smart search only says something is wrong - it seems like it should either revert to a precise search or state something regarding an internet connection problem.