They seem trying to think how to fall that person. Such is harmful in the society and in the world. It isn't a road to harmony, like the name "aikido" means. I used to train jyst each adviced technique as a method of falling the attacker, and cooperation helping in practicing. As such it really was in some respects a way toward harmony, even though some of the pairs had a somewhat nasty character as their initial motivation for the hobby. When there is harmony, there is no need to gight, instead each one finds one's natural place in the world and wisdom of life. One who wishes well for the world learns how complex wholes work well in many places and as a whole, and so one learns sports talents too. Justice and responsibly for good living conditions for all fairly now and in the future, are important for getting complex wholes work well, for finding yhe best answers, and correcting each practical deed to fair creates room for life.