5. The method as recited in claim 3 , wherein identifying each potential confusion zone within the word-level alignment sequence includes identifying each substitution element, insertion element, and deletion element as a respective potential confusion zone.
5. The method as recited in claim 3 , wherein identifying each potential confusion zone within the word-level alignment sequence includes identifying each substitution element, insertion element, and deletion element as a respective potential confusion zone. 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.