Through an amusing story, Maulana Thanvi tells us that you will find some people to be of such low intelligence that it is completely futile to argue, persuade or dissuade them from anything through reason. Most of the time, it is just good to bid them on their way rather then to waste your effort on them.
Once, a man was getting his son married and he borrowed a shawl from his friend for the groom to wear on the day.
The wedding day arrived, and as is the norm, the guests were asking the whereabouts of the groom. The man who had given the shawl was also present, and duly told them 'the groom is over there...and yes the shawl is mine'. The father of the groom felt quite put out by this, and said to him 'You are a right buffoon, why did you have to say the shawl is mine?' and he answered 'yes you are right, it was a mistake, I shall not do it again'.
Later, some other guests asked after the groom, and the man responded 'Yes, the groom is over there, and the shawl is NOT mine' Again, the grooms father, fearful for his dignity, chastised him saying 'Look, what is the need to mention the shawl?' and the man agreed 'hmm yes, there really wasn't any need, alright I won't mention it now'
As usual, some others asked where the groom was, and the man again came forward 'Gentlemen, the groom is over there, and there is no mention of the shawl!'