“Never interrupt your enemy when he is making a mistake.”

Napoleon Bonaparte
Emperor of France (1805-1814)

Although this quote is in reference to military matters, it also has its uses in arguing a position. As hard as it may be, sometimes it’s best just to let someone ramble while making all sorts of logical fallacies. Your opponent may just show exactly how much of a fool they are or at least let you demolish most of their strong arguments before they can start moving the goal posts further or start switching their attack vectors.