It is amazing the sheer level of ignorance you would find in many Jehovah's Witnesses when you press them about their teachings.
Sometime back, I had a pioneer brother, who I refer to here as "Brother Hero," approach me to offer to study the Bible with him (using their publications of course). I was amazed at the sheer level of ignorance this man had concerning their doctrines. Here was a man who had been 'in the truth' for forty years. My wife always feigned, "I am just studying the milk of the truth," whenever I questioned her concerning their doctrines and she could not explain them. I guess this gentleman you spoke with was still nursing on the 'milk' and was not ready for the 'meat.'
Same language used by the IFB's back when I use to be one.