It was a misunderstanding on her part, not a deliberate 'deception' on his (part). [=he didn't try to deceive her or lie to her]
The article describes the government's use of 'deception' [='deceit'] to gain public support for the program.
She 'practiced deception' on her unsuspecting clients. [=she deceived them]
(..) WHITE PORTUGUESE The "WHITE PORTUGUESE" is not a man. It's a ship. Master Wayne. Since the age of , you have been to the art of deception as Mozart to the harpsichord. But you've never been too hot of lying to me. The WHITE PORTUGUESE isn't carrying a dirty bomb. (..)2016 Batman v Superman: Dawn of Justice