Please use some facts

I love to argue, and will do so on any point for which I can find facts that back up my argument. I believe that everyone has the right to his or her opinion, and I encourage expression of opinion on this site, whether I agree with it or not. The thing is, if you are only using conjecture and hearsay to back your comments--"facts" that would never stand up in court, for example--there is nothing for me to argue about. Just a thought I had to clear...