I remember a situation someone related to me once where a JW was with his "wordly" workmate in a social setting with a group of educated professional people.
The discussion eventually got around to linguistics and the history and development of languages.
The worldly friend of the JW, coaxed his JW friend to tell everyone at the table where all the different languages really came from (in reference to the incredibly ridiculous tower of babel story).
This proved extremely embarassing for the JW who realized how absurd the explanation was while he was trying to relate it. He actually distanced himself from the story right then and there. It didn't take long for that individual to fade away.
Sometimes all it takes is one overwhelming absurd teaching to cause the lights to come on....
The Oracle