True story. Regarding defending the indefensible I have sent multiple e-mails to an educated, smart, born-in elder, in which I presented evidence (usually scans from WT magazines or books) demonstrating the Watchtower's deceptions, errors, questionable doctrines and outright ridiculous past beliefs and statements. His responses in so many words were:
"Dear non JW, your evidence is tainted" or "the organization is the truth, but you are not spiritual enough to understand it".
It all boils down to: rational arguments are not satisfactory and rational individuals are not spiritual and can't have access to God's mysterious ways.