If you can’t win an argument, correct their grammar instead. (Source unknown)
Someone has called this the #1 rule in arguments. That’s really sad, isn’t it? Yet, most of us hate to lose an argument so much that we’ll try anything to win. Correcting grammar might be helpful to your opponent, to be sure, but it certainly doesn’t advance your argument or increase your popularity. So, be gracious in your verbal confrontations. Better yet, be quiet.
A gentle answer turns away wrath, but a harsh word stirs up anger (Proverbs 15:1).