ADCMS:
Of course, if they'd had their "Reasoning" books handy, they could've looked up why we can prove 1914 just from the Bible.
Maybe if the Watchtower is willing to develop a Reasoning Book app that can be used with the new Google Glasses, Witnesses won’t have to endure this embarrassment at the doors. Though, this could prove to be perilous should the app accidentally search the web for “Good Head” instead of “Godhead”.