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'Captcha'ing the SpambotsWhen answering questions or posting messages you may now see a request to enter several characters that appear in an image.

We put this in place to prevent "spambots" (computer programs that spider the web automatically posting offensive messages and advertising) from modifying the site. Entering the characters in the 2 words in the images proves that you're a human being. This sort of filtering device is called a CAPTCHA program.

This particular CAPTCHA program was created by Carnegie Mellon University; while catching non-human contributions, it also helps digitalize books so that they can be available for reading/searching on the internet! An innovative system has been devised whereby users are presented two distorted word images. One of the words will be known and one won't. Type them both in. By comparing what multiple people type for the unknown images the system figures out the identity of the mystery word. The system is being used to digitize books from the Internet Archive, old editions of the New York Times and old time radio shows.

Spambots became such a problem that we needed to implement a technical solution. We apologize for the inconvenience. However, if you log in with your username and password, you will not be requested to fill these in when answering a question.

What if I have difficulty reading the 2 words?

As an alternative for those who have trouble reading the word images, you can click the horn icon to hear an excerpt of an old-time radio show. Then type as much of what you hear as possible.

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Q: Why do you have to type in two random words to answer a question or post a message?
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Why you have to type in two random words to answer a question or post a message?

That's called a "captcha", and it is used to try to avoid computer programs automatically doing certain actions. Otherwise, websites might easily be flooded by useless messages.


Even though you have to type in 2 random words to post a message or answer question why do the random words have to look blurry and hard to see?

Some people can develop text recognition software, the words you are referring to are Captchas, and Captchas exist so spam-bots do not get through. The Spam-Bots are run by a computer, and computers can not recognize blurry, or partially covered text.


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Why I have to type in two random words to answer a question or post a message?

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