Water Sensor treated as hard cutoff or advisory input

I have read the support article on rain sensors under the setup section, but did not see this question answered.

If a water sensor is attached, is it used as a hard cutoff (water sensor “on”, meaning it rained) so sprinkler will not run? Or is it used as an advisory input to your algorithms that may or may not result in sprinkler delaying or canceling a schedule?

@Ken‌ It is used as a hard cutoff. Please let us know if you have any more questions or feedback. Thanks!