As in:
"Have you completed the task?"
"Yes!" -- no matter what
If instead you ask for a project completion sign-off document, you're forcing them to provide the answer you were actually looking for.
Has it been regularly serviced?
Vs
Where do you take it for service? What date was it’s last major service?
As you and others pointed at out, this is a very general principle. It comes from the fact that close-ended questions sort of puts words in someone's mouth (the trick is sometimes used when you want a poll to yield a specific result).
A lot of people are also too afraid to say they don't understand or hear you, and will just go "yeah yeah". It's aggravating, but it's both real and no real ill intent behind it.
Case in point: https://youtube.com/watch?v=n3AGpvV7KLI
If they can’t get their accessibility shit right, no way they’re going to have working snow plows in winter. Also the underground canals are gonna be so clogged that a mildly heavy rain will create fucking lakes and rivers on the streets.