Talk:Causality Reversal/@comment-5150583-20121019230926/@comment-26241075-20121020050456

Interesting question. You know about an old Chinese story, about a man who sell "a spear that count penetrate anything" and "a shield that can block all attack", so what will happen if the spear strike the shield? That's the famous Irresistible force paradox, thus there is no fixed answer for a paradox, so it's may depend on the level of the user and more important, your choice.