What is the failure case for the Cloudflare captcha? In case browser fingerprinting fails to identify me as a human, do they fallback to a challenge that humans

What is the failure case for the Cloudflare captcha? In case browser fingerprinting fails to identify me as a human, do they fallback to a challenge that humans can solve, such as audio or image challenges? Say what you will about Recaptcha, but they do have a way to eventually pass through the challenge.