No, it's suggesting that, for example, when interviewing a black and a white candidate, each of whom has a reference letter and a set of test scores, the interv

No, it's suggesting that, for example, when interviewing a black and a white candidate, each of whom has a reference letter and a set of test scores, the interviewer would favour test scores if the white candidate had higher test scores, but would favour reference letters when the black candidate had higher test scores. If only test scores or only reference letters were available, they'd hire based on merit. In other words, people engaged in discriminatory behaviour when there was a way to rationalize/cover it up, and pretend they weren't doing it -- possibly telling themselves that, too.