This may have issues with non-native speakers. You have to know language fairly well to answer those questions.
TextCAPTCHA: 180 million simple logic questions
21–30 of 66 posts
Re: TextCAPTCHA: 180 million simple logic questions
#22The first letter in the word "titties" is?
Beware if you have users that might be sensitive to such things.
Re: TextCAPTCHA: 180 million simple logic questions
#23I understand the importance of CAPTCHAs, but I wouldn't put anything that required a reasonable level of thought in between my users and something I wanted them to do (for example, buy something from me). The more complex CAPTCHAs get, the less likely users are to try to complete them.
It strikes me that the specific example of buying something is generally sufficient confirmation of identity even without a Captcha. Not that your point isn't valid.
Re: TextCAPTCHA: 180 million simple logic questions
#24It seems to me that this wouldn't work. There are not so many different types of phrasings, so it would be fairly simple to write a parser generator which would then pass to a very basic interpreter to solve them.
For example, to solve the "Which of these is a T: W, X, Y or Z?" you would just put in a rule like "BodyPart ::= Foot | Knee | Leg | ..." "DayOfWeek ::= Monday | Tuesday | ..." "Color ::= Red | Blue | ..." and then have it match against those.
Maybe the next time I have some free time I'll see if I can go and implement it.
Re: TextCAPTCHA: 180 million simple logic questions
#25Obligatory XKCD link: http://xkcd.com/810/
"Constructive Spam"
Re: TextCAPTCHA: 180 million simple logic questions
#26Some of the questions don't have one globally unique answer, for example: which day is a part of the weekend, Sunday, Friday or Monday. Where I live (Israel), Friday is part of the weekend, were as I bet the creator of the list lives in the USA and as many times happens, believes the USA==World and the "correct" answer is probably Sunday.
Stop bombing palestinian children and we'll start giving a fuck about what you call the weekend.
Re: TextCAPTCHA: 180 million simple logic questions
#27"Ten, 33, thirty five, 10 and thirty six: the 5th number is?"
10? Thirty? Thirty Six?
Re: TextCAPTCHA: 180 million simple logic questions
#28The first letter in the word "titties" is? Beware if you have users that might be sensitive to such things.
The first one displayed on the page for me was:
"pubes" has how many letters in it?
Re: TextCAPTCHA: 180 million simple logic questions
#29I would be interested to see what the completion rate for this is versus, e.g., the Yahoo captcha. My intuition is "not that great." (You require reading on the Internet... uh oh.)
By the way, picking one token from the captcha and returning it beats the captcha 7% of the time, if the examples are representative. Spammer wins, since he can generate requests by the hundreds of thousands.
Re: TextCAPTCHA: 180 million simple logic questions
#30The first letter in the word "titties" is? Beware if you have users that might be sensitive to such things.
Yes. And here's a picture of some tits (http://www.btinternet.com/~micka.wffps/great_tit.jpeg).
