This was a large gathering in a missionary setting. God works in amazing ways to be sure!
These were people, sinners, who did not believe, who knew little or nothing about God. As far as I know most or all of them were simply curious to hear a foreigner speak about anything.
1. I am certain that their belief and professions were credible.
2. We questioned them at length. All were baptized and while I have not been able to follow all their lives, all seem to be faithful in a difficult environment, growing in faith and service. In very short, we asked if the people understood sin and what it meant to be sinners. We asked if they believed Jesus and the Gospel. We asked if they renounced Satan and sinful life. We asked if they understood and were ready to enter a covenant relationship with God and were ready to remain faithful until death.
Notes:
1. I am not going into all the questions we asked in this thread as that seems off-topic to me, though a good request. Our conversation was much more about teaching than grilling.
2. I do recall one of the people, a woman, seemed less engaged than the others, her eyes wandering around, looking away as she answered questions. I had doubts. I asked a native Christian friend about her situation and she informed me that the woman was blind. Sometime later the blind woman made a comment something to the effect, "My eyes may not see, but today for the first time my heart can see."