Only argue if you think you genuinely will learn something by doing so, or unless the person is important enough ( http://xkcd.com/154/ ), and actually listening enough that this is a good use of your time.
If you don’t think you’ll learn anything, don’t argue. Or say something like “this is wrong, maybe check out site X” and don’t worry too much about it.
The above is pretty much why I don’t argue politics online anymore, but it’s also a good reason for people to spend some time arguing politics online.
Only argue if you think you genuinely will learn something by doing so, or unless the person is important enough ( http://xkcd.com/154/ ), and actually listening enough that this is a good use of your time.
If you don’t think you’ll learn anything, don’t argue. Or say something like “this is wrong, maybe check out site X” and don’t worry too much about it.
The above is pretty much why I don’t argue politics online anymore, but it’s also a good reason for people to spend some time arguing politics online.