The case sensitive part is quit easy to explain, every taunt line should start with a capital, but that is not being checked by the score engine.

So if a line should be:
 Code:
Taunter: Coconut! Your steed is a silly duck.

And your code returns:
 Code:
Taunter: coconut! Your steed is a silly duck.

The score engine will not fail the test.
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It's better to have scripted and died, then to never have scripted at all