Prior to the sentence in question, he writes this: > Beyond merely detecting clichés, the program could also offer statistically unique replacements for each c

Prior to the sentence in question, he writes this: > Beyond merely detecting clichés, the program could also offer statistically unique replacements for each cliché [...] I missed that the first time around. I don't like "statistically unique" either, and for the same reason. What I think he means is "statistically improbable." A cliché is a cliché because it's overused. So, computerized editing would want to replace overly common phrases with less common ones: hence, "statistically improbable." I would recommend he re-write that sentence, and then re-write the other to jibe with the first. Strictly speaking, I don't think he should use unique in either place.