can you turn these captcha expressions into small arithmetic expressions
that people know they need to compute and the spammers don't see?
On Mar 22, 2011, at 11:28 PM, Robby Findler wrote:
Looks like the spammers have found a way thru google's captcha thing.
There were just three spam
Will the syntax be infix or prefix? Will the semantics be fixednum or bignum?
On Wed, Mar 23, 2011 at 7:00 AM, Matthias Felleisen
matth...@ccs.neu.edu wrote:
can you turn these captcha expressions into small arithmetic expressions
that people know they need to compute and the spammers don't
Yesterday, Neil Van Dyke wrote:
Robby Findler wrote at 03/22/2011 11:28 PM:
Looks like the spammers have found a way thru google's captcha thing.
That's frustrating. I wonder whether a simple homebrew captcha
(e.g., varying but simple Racket expression that even beginners
understand and
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