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 You need to make sure you don't have your shift, ctrl, or alt key actually bound to an action. You can /copybinds Epicbeast if you can't find where you might have a potential keybind that would conflict with your ability to hold a modifier key. 
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				Computing the probability that at least one of the following events will occur: 
P(a or b ... or z) = 1 - P(!a and !b ... and !z)
Probability |