Well there are a lot of people that like to post their opinion, and they stay on the post for a while, but with the time they know that the discuccion will become repetitive and, maybe one will understand the poster idea but others will not so the poster will have to answer to them, but them someone else that didn't wanted to read the whole threat will ask the same question or some will just ignore the other person idea or thoughs, like most of the debates..., is really unlikely to change someone else opinion or idea of X thing in a post unless you are in a informative threat...