The Postman always rings twice…

Monday
“Do X and X live here?”
“No.”
“You sure?”
“Yes, they left 11 years ago.”
“That’s very exact.”
“We bought the house from them.”
“Oh.”

Tuesday
“Do X and X live here?”
“No.”
“You sure?”
“Yes, they left 11 years ago. We bought the house from them.”
“Oh. We had this conversation yesterday, didn’t we?”
“Yes we did.”

This morning
“X and X still don’t live here?”
“No change from yesterday.”
“No harm in asking.”