I can answer this question. If a person couldn't understand what happens at death or what god's name is, they USUALLY didn't get baptized. However, almost every person I went over questions, could not, per the Society, correctly idenify the "faithful and discreet slave". Yet any that did not understand this basic tenet of belief were still allowed baptism. I remember going over questions with a person that got nearly every one wrong.The other elders said she did alright with them and must have been nervous or intimidated by me. She subsequently got baptized and quickly left the "truth" 3 months later.