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It has been like this for a while now. AFAIK you have either

  - the actual captcha and a word from a book (Google Books)
  - the actual captcha and a house number from Street View (Google Maps)

Only the actual captcha has to be typed in correctly.

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Do people ever intentionally type in nonsense for the non-captcha part, out of spite, for instance? If you could persuade enough people to provide non-answers for the non-captcha part, would Google stop using it (the non-captcha part)? My guess is it's like spam. As long as it works a small fraction of the time, it will still exist.

I don't think I've typed a whole captcha in over a year. It is always obvious which part it's necessary, and now that most of the time the unnecessary part is to improve Google's bottom line by checking addresses instead of helping digitize books I will continue typing dhgd instead. typing an intentionally wrong word is just as much a waste of time as typing the right word

I did when Recaptcha came out and it was consistently obvious which was the unknown part. It's no longer so obvious, in my experience.

I believe ReCaptcha presents the same unknown value to several users, and rejects outliers.

In my experience, it's still extremely obvious. It's always the word that's less readable (and doesn't look like it came from a book). And if you have numbers, it's even easier.

Recently they added special captchas for untrusted users. If they think you might be a bot, you'll get much harder captchas.

http://googleonlinesecurity.blogspot.com/2013/10/recaptcha-j...

I always refresh until they give me a ``hard'' captcha because the numbers, although easier to read, are harder to type.

Actually often it can be the opposite of what you would think. I don't think Google will distort the "unknown" word as much as the "known" word, making it where the "known" word can be harder to read for a human because it's passed through more filters.

At one time, there was this effort on 4chan to spam recaptcha with "penis" for the second word. When this got to some online news site, they asked the recaptcha guys who confirmed that the traffic was irrelevant.

I suspect the nonsense won't matter. You're drowned out.

I'm sure people do intentionally type nonsense sometimes - I just did for example. Google can get around that by looking for the same answer a few times. Like if the responses are 0000, 4513 and 4513 it's fairly evident which is correct.

All this speculation on whether or not you can type anything for the other word when you can just try it.

http://www.google.com/recaptcha/learnmore

Only worked once for me, and only when I typed a word that was of similar length to the original, but I was only able to get it to work that one time. Leaving it blank or with a period or only four letters would be an extremely obvious thing to check and deny access to.

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