I dunno . . . I was always pretty confident when "discussing" Bible related topics. I used the Reasoning book quite a bit, tho. At the doors, it rarely got down to really "deep things". With the Bible studies I conducted, we always studied the "elementary things" and the studies never progressed to the "meatier things".
When I was 20 years old, I started a Bible study with my next door neighbor, Scott, and his brother in law. His mother was upset that he was studying with a Witness, so she arranged a meeting between me and her church's pastor to try and convince the kid (18 yo) that the JW's were wrong. Me and this minister sat debating doctrine infront of my Scott and his mother . . . everything from the trinity to life after death. I relied heavily on the Reasoning book, but I am such a good sales man that it appeared I had the poor guy on the ropes most of the time, and mom was pissed that her paster was getting "pimp slapped" all over the place, while I was becoming Scott's hero. (either he was a very stupid minister, or I was super Bible dude ) At the end of our 90 minute debate, the minister was ragged and I was beat, and we parted company. My Bible study, Scott, said to me right in front of his mother, "Dude! You totally kicked his ass!" He departed with me leaving his mother wringing her hands.
Scott eventually went back to drugs and stopped studying .
A couple months later, I ran into that pastor again in a place where two Christians had no business being. It was very awkward and very funny (in retrospect). I was embarrassed, and so was he. We talked for a couple minutes, but never brought up Scott, the Bible or anything else.
Corvin