While grinding's potential to cause players to stop being entertained may be seen as contradictory to good game design, it has been justified in several different ways. The first explanation is that it helps ensure a level playing field. According to the Pareto principle, players with better aim, faster reactions, or more extensive tactical knowledge will quickly dominate the entire game, frustrating the now-powerless vast majority. By creating a direct correlation between in-game power and time spent grinding, every player has the "potential" to reach the top 20% (although the Pareto principle will still apply to the amount of time spent grinding).