“I may,” said Poirot in a completely unconvinced tone, “be wrong.”
Morton smiled. “But that doesn’t often happen to you?”
“No. Though I will admit – yes, I am forced to admit – that it has happened to me.”
“I must say I’m glad to hear it! To be always right must be sometimes monotonous.”
“I do not find it so,” Poirot assured him.
― Agatha Christie, After the Funeral