We just had this discussion with Fuss while I made the bed and straightened a bit.
"You should always believe grownups because they're always right."
"They are?" Tiner asked.
"They're always right because they never lie."
"Well, some of them don't." I noted.
"Grownups never lie- that's been stuck in my head for my whole entire life."
"Mama & Dada will never lie to you," the wife added.
"I know, that's because we don't lie in this family."
"That's right, Fuss. We don't lie in this family."