I think you can easily convince some silkies. Even potatoes make appealing babies to them. But that’s silkies for ya. And yes, I think they do convince each other to time it just as they all started laying reliably.
I have a Jersey Giant that spends most of her life broody. She has been sitting on golf balls for 3 weeks. I tried to give her brand new chicks straight out of the incubator and she ignored the chick. Even when I took the golf balls away she sat on imaginary eggs and refused to keep the chick.