Chait, Jonathan (March 31, 2010). "Crying Wolf". Bursztein, Elie Bethard, Steven Fabry, Celine Mitchell, John C. Jurafsky, Dan (2010). "How Good are Humans at Solving CAPTCHAs? A Large Scale Evaluation" (PDF). 1862. Even if the rules allow it, I won't be able to hip shoot a cannon.