callumacrae wrote:Pony99CA wrote:callumacrae wrote:If they're generated automatically, thy can be solved automatically.
Not true. The characters and selection criteria are randomized. Just like the examples given, a spambot would still have to figure out which word was important and which characters to select.
It's entirely true, and moderately trivial if given access to the source.
Wow not bad. You just single handedly refuted an entire research field in computer science, I suggest you maybe read up on CAPTCHAs, Reverse Turing Test and Turing test before you continue to make assertions about issues you have little understanding of.