"Strong to?"

This might be the wrong area to be bringing this up, but what exactly does the "Strong to" section mean? It says bombs are generally 50% "strong to" just about everything but fire, yet my damage on elemental magic is normal and I have never experienced any difficulty sleeping a bomb. Also, if I'm doing anything wrong here, let me know. This is my first day editing wiki. --Dissonantoshimasu 08:57, June 1, 2010 (UTC)

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