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flannan

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80-20 rule
The top 20% of people (by whatever measure) get 80% of the goodness. An observable trend in many real-life situations. In an RPG context the 80:20 rule is usually cited as the reason for avoiding basing anything on a player's real-life skill level in a game that is distributed across a large number of people (as in a tournament or online RPG) since it will quickly become the case that anyone outside the top 20% of skill will be completely dominated and have no motivation to continue participating.