Interesting, I always thought reCAPTCHA randomly combined words for each instance. These guys were able to get around it because each CAPTCHA has an id. Have so

Interesting, I always thought reCAPTCHA randomly combined words for each instance. These guys were able to get around it because each CAPTCHA has an id. Have some people from mechanical turk build a database of responses and you're set. Assigning a non-unique id to CAPTCHAs that are reused kind of defeats the purpose I guess.