"You sure, Professor?" Ace asked with more than a trace of sarcasm in her voice. "Given all the other times . . ."
"Ace, Ace," he sighed. "Isolated incidences do not form a general rule."
"You do know that the Roseblack's going to use one of her Warstriders to break into this thing if we can't get in the sneaky way?"
"Then again, sometimes isolated incidences are on the right lines. Pass me the umbrella."
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