Probability of existance is the measure of an objects influence on reality. The higher an object or effects POE, the greater an influence on reality it has. If two factors are in conflict, the one with a higher POE has a greater chance of overcoming the weaker depending on how much greater the POE actually is. The most common occurance of the weaker factor being overcome in a collsion is the weaker factor breaking, although if the inherently stronger factor is overcome it does not necessarly break.
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