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]
(..) I just did what she asked. Raymond, I'm sorry. I have nothing for you, Kate. No parables about loyalty, no florid speeches of trust belied, deception, treachery, or false devotion. I'm simply too bereft. It will have to suffice to say... I would name every human being on the planet before you (..)2016 TvShow: The Blacklist Title: Alexander Kirk (No. 14): Conclusion Season: 3 Episode 23