It’s almost proverbial that it is difficult to win an argument. That is, if we take successfully changing the opponent’s mind as the condition for victory. Most arguments end up with all parties involved becoming frustrated that their opponent is incapable of agreeing with them. Worse, both parties are often just as likely to become even more convinced of the beliefs they held when the argument began.
When it comes to changing our minds about some issue, the is/ought dichotomy once again comes into play. The former is the question: what conditions actually obtain when a given person changes their mind? The latter is the question: what conditions ought to obtain for a given person to change their mind?