Regular

Vetinari drummed his fingers on the table.
“What would you do if I asked you an outright question, Vimes?”
“I’d tell you a downright lie, sir.”
“Then I will not do so,” said Vetinari, smiling faintly.
“Thank you, sir. Nor will I.” 

– at least he’s honest |
Terry Pratchett, Thud!