If the apple recognizer has seen A-P-P-L, it'll think to itself, "Hmm, I think an E is probably likely," and it'll send a signal down to all the E recognizers saying, "Be on the lookout for an E, I think one might be coming." The E recognizers will lower their threshold and they see some sloppy thing, could be an E. Ordinarily you wouldn't think so, but we're expecting an E, it's good enough, and yeah, I've seen an E, and then apple says, "Yeah, I've seen an Apple."
Если различитель антоновки увидел А-Н-Т-О-Н-О-В-К, он задумается: « Хм, я думаю А здесь вполне вероятна », — и он даст сигнал вниз всем различителям буквы А: « Будьте начеку, думаю, А на подходе ». Различители буквы А снизят свой порог восприимчивости и, увидев какую-нибудь каракулю, подумают об А.