A couple of times while I was anti-witnessing I have made a fundamental mistake, which was to try to show the Believer that it was neither intellectually nor Scientifically necessary for there to be a Creator. The discussion got to this point because I said I was an Atheist.
This latest time was talking to a street preacher who was not a J.W, but he did the same thing they do, i.e not really listen to the points I made, tried to rubbish Science etc.
I have decided when, (if), this happens again I shall say something along the lines of " Whoa there ! you have done a huge leap from talking about your Bible god to the matter of a Creator, if I concede there was a Creator, how can you prove it was your god ?"
They then resort to the Bible, to try to prove the Bible ! But wasting time on people who do not really listen, and do not think about what you present, is something I may not do much of in future, it is so frustrating !