> a pair of words, one of which was unambiguously resolved by an OCR and the other of which OCRs couldn’t easily read
4chan had a lot of fun with this when it was first implemented. Perhaps unsurprisingly, there very quickly developed a campaign to have everyone insert "n**r" in place of the unknown word. Many threads were dedicated to education, onboarding, and, of course, sharing 'trophies' when such a replacement was found to have taken effect in one of Google's products (Books, iirc?).
4chan had a lot of fun with this when it was first implemented. Perhaps unsurprisingly, there very quickly developed a campaign to have everyone insert "n**r" in place of the unknown word. Many threads were dedicated to education, onboarding, and, of course, sharing 'trophies' when such a replacement was found to have taken effect in one of Google's products (Books, iirc?).