Many Internet conversations turn out fine: one fellow convinces another, and everybody’s happy.
Other conversations turn into off-road mudfests. Tires spin, mud spatters, and no one is convinced of anything. When the moment arrives that you realize you’re getting nowhere you should give up. I can persuade some people sometimes, but I can never persuade all the people all the time. I lack the skills for that.
At that point, the moment has arrived when I need to avoid this:
You can’t win them all, and you can waste a lot of time trying. It doesn’t mean that anyone is a bad person; it just means that not everybody can be persuaded about just anything. At that point, it is time to stop and go watch a movie or something. Or go to bed. :-)