Here's a short account from my friend Al.
"The conversation was very cordial. One of them opened their bible to Luke 4:3, which in their translation read, "The devil said to him, "If you are a son of God..." I pointed out in my interlinear Bible that the Greek clearly uses the definite article and it should be translated, "If you are THE Son of God" not "A son of God." They do not believe that Jesus is God so this threw them for a loop.
Like I said, we talked for a little more but they lost their train of thought and did not want to listen as I tried to explain the gospel. They excused themselves and went on their way. I tried to give them some CD's of a recent sermon I did on the 144,000 but they declined. "