I suppose then the more interesting question is what we should do when we encounter them. Do we risk taking things off-topic by explaining the error, in case they don't realise, or is it best just to ignore them completely and focus on those with whom you can have a proper discussion? Perhaps there's a way to gently nudge them back and hope they realise on their own?
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~
I suppose then the more interesting question is what we should do when we encounter them. Do we risk taking things off-topic by explaining the error, in case they don't realise, or is it best just to ignore them completely and focus on those with whom you can have a proper discussion? Perhaps there's a way to gently nudge them back and hope they realise on their own?
"If all mankind minus one, were of one opinion, and only one person were of the contrary opinion, mankind would be no more justified in silencing that one person, than he, if he had the power, would be justified in silencing mankind."
~John Stuart Mill~