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Using Random Questions
This example uses random questions to determine if the form-filler is human or machine. The questions are intended to be simple, but do require the user to have a knowledge of English. If the question is answered incorrectly, the message is not sent - but, unlike here, no indication of failure should be given to the user. The code used for this page is here.
Note that this form does not send messages to anywhere - errors or not.
In this demonstration, if the question is answered incorrectly it is marked as having an error.
