Hi @X-Ryl669 welcome to Common Voice community! 
You idea is really interesting, and really resonates into the field of “alternative ways to collect data”.
I’ve been reading the comments from github and the idea is interesting: Display user with 3 sentences to validate, 1 of them is already validated, if the user gets it right, the captcha is validated and we get 2 validations for free.
Do we have documentation about how other captchas work? If we are talking about a Yes/No question, someone can always click Yes and have a 50/50 chance to bypass the captcha, so I don’t really know how to improve the efficiency.
See how others have been using the API to build external tool, maybe someone wants to play with it to create a test.
Thanks for your feedback!