Elicitation. Believe me when I tell you, I used to be played like this COUNTLESS times. They still do it. Make a declarative statement and wait for you to chime in. They always smile, like they did something.
If you want to have some fun with these kind, instead of chiming in, ASK THEM A QUESTION. Really. It works. It is not something they expect, so usually they stumble over themselves or just say the old reliable, I DON'T KNOW.
I heard that I DON'T KNOW, ten bazillion times. And then you have them. They just outed themselves as PLAYERS against you.
See it?
https://old.bitchute.com/video/rxzaJ9bWlngq/