6. The method as recited in claim 5 , wherein determining the probability of the speech recognition system confusing words within a given potential confusion zone includes performing a phoneme-level alignment across phonemes of the one or more words of each of the pair of statements within the given potential confusion zone, and computing a phonetic accuracy value for the given potential confusion zone based on the phoneme-level alignment.
10. The method as recited in claim 6 , wherein the phonetic accuracy value corresponds to a measure of confusion probability between the one or more words of the first statement within the given potential confusion zone and the one or more words of the second statement within the given potential confusion zone when audibly processed by the speech recognition system.