I know this is considered a mystery by many but I hope I can get some answers that will at least help me to understand or gain some perspective. Physiologically all professional boxers/MMA fighters should have the necessary force/power to inflict a (KO) as many sources I have read state that this phenomenon does not require that much power to begin with; rather accuracy and speed (factoring in other apsects such as the chin of the opponent). So I guess my question is how come some fighters are considered to NOT have KO power (also without considering those who are intentionally defensive like Mayweather who doesnt look for the KO or Khabib who just uses punches to set up take downs). And shouldnt all fighters be theoretically able to deliver a knock out considering their level of training and strength? Is the differences in knockout percentage more related to precision than the actual power of the fighter? Or is it that stronger punchers can inflict KOs without as much precision because of their power? Which brings me back to my question on the argument that there is not an extraordinary amount of force needed for the knockout?