To Devs: What is Resistance Penetration? Is it Binary or a Sliding Scale?

I am curious about resistance penetration on an RK. Specifically, is our "resistance penetration...

Source: http://forums.lotro.com/showthread.php?390550-To-Devs-What-is-Resistance-Penetration-Is-it-Binary-or-a-Sliding-Scale&goto=newpost

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