I get really irritated when someone won’t accept “I don’t know” as my answer. Something along the lines of:
”Sarah is having a baby! Do you know when it’s due?”
”No, I didn’t know she was pregnant”
”Her oldest is four and she didn’t want a big age gap so it’s probably soon” <Looks at me expectantly>
”I didn’t know she was pregnant so no idea I’m afraid”
”But when do you think it would be?” <Looks at me expectantly>
”Still no idea. Between now and six months?!?”
Or
”I need to hire a nanny. How do you recruit a nanny?”
”I don’t have a nanny so couldn’t say. Have you talked to Sarah, she will probably know?”
”I should probably talk to a nanny agency, which one should I call?”
”I’ve never hired a nanny through an agency so no idea I’m afraid”
”But you must have some idea!”
It has to be okay to sometimes just say “I dunno”.