One of my opening questions to jws when approaching them at the trolley /cart is ' how long is a creative day? ' the look on their faces is priceless especially if it's a younger jw accompanying an older one as they shuffle nervously for an answer. It's a good opener to lead to other points such as the op question.
P's..after my last trolley discussion the brother invited me back for further discussion giving me the time he would be back. My discussion that day centered on the non inspired error of judgement of the fds/ gb theme hopefully I hit a nerve .