One thing that helped me when I was trying to convince Mr Scully that JWs were full of crap was the quotation from the Insight volume & Aid book that served to define the word LIE.
The WTS's own explanation is along the lines that lying - by avoiding the exposure of the truth (actual true information as opposed to The Truth™) was acceptable if it was done to confound God's enemies (more precisely people opposed to JWs). It justifed this behaviour by saying that these people were not entitled to truthful information.
I thought about the date-setting that I'd lived through personally (1975) and recalled a convention where they were counting down the months and claimed that the next convention would be held in the New System™. The following year, however, when Armageddon™ hadn't come, the scoldings from the platform were along the lines that it was OUR FAULT for wanting it so badly. Well, who were the ones that created those expectations and hopes in the first place? Who were the people responsible for publishing those magazine articles that mentioned dates in the first place? It bothered me, in retrospect, that we were essentially being blamed for believing the Publications™ - which is exactly what they expected us to do!
All that back-peddling and blame-shifting irritated me, until I read that definition in the Insight volume and suddenly it made sense: The Governing Body™ was practicing Theocratic War Strategy™, not on public officials that were intent on hindering the Preaching Work™ as the definition originally implied, but they were applying it to rank-and-file JWs, Joe and Jane Publisher and their families. They considered all Jehovah's Witnesses to be not entitled to truthful information. They were all about self-preservation, about keeping the cash flow going to feed the monster that they'd created, and they didn't care that there were good people who put their trust in the Organization™, and followed its every directive to the letter, no matter how ludicrous or dangerous it was to individual JWs and their children.
When I showed that definition to Mr Scully, and asked him how he would know - in the face of his own experience with Elders™, Ministerial Servants™, Circuit Overseers™, etc. having instructed us from the platform to hide the truth of our beliefs from Householders™, employers, school teachers, etc., - how could he trust that he personally wasn't misled as someone who had been recruited by the JWs? Then we looked through the Live Forever™ book, and saw how deception and manipulation was used from the very first chapter of the "recruitment manual".
That's when it hit him like a 2x4. We attended our last meeting at the Kingdom Hall less than 3 months after that.