[Routasydän]

If you go into the discussion with the objective to convert unbelievers to the word of truth, then yes, discussion rarely changes minds, I've noticed. However, you will get confirmation for your own world view, as you arguments are countered with the same age-old ad hominems and guilty-by-association tactics often employed by our opponents. You will test the strength of their arguments and can see for yourself what they amount to, whether there is something you need to change in your thinking.