16. The non-transitory data storage device as recited in claim 15 , wherein the word-level alignment sequence is characterized in units of a matching element, a substitution element, an insertion element, and a deletion element, each matching element corresponding to one or more words in a first statement identical to one or more words in a second statement, the first and second statements composing the pair of statements, each substitution element corresponding to one or more words in the first statement substituted with one or more different words in the second statement, each insertion element corresponding to one or more words in the second statement not present in the first statement, and each deletion element corresponding to one or more words in the first statement not present in the second statement.
16. The non-transitory data storage device as recited in claim 15 , wherein the word-level alignment sequence is characterized in units of a matching element, a substitution element, an insertion element, and a deletion element, each matching element corresponding to one or more words in a first statement identical to one or more words in a second statement, the first and second statements composing the pair of statements, each substitution element corresponding to one or more words in the first statement substituted with one or more different words in the second statement, each insertion element corresponding to one or more words in the second statement not present in the first statement, and each deletion element corresponding to one or more words in the first statement not present in the second statement. 17. The non-transitory data storage device as recited in claim 16 , wherein the confusion zone identification module is defined to identify each substitution element, insertion element, and deletion element as a respective potential confusion zone within the word-level alignment sequence.