The phrase "a duplicity" is correct and usable in written English.
It can be used to refer to a situation involving deceit or double-dealing, often in a moral or ethical context.
Example: "His actions revealed a duplicity that shocked everyone who trusted him."
Alternatives: "a deceit" or "a double standard".
There is a duplicity there.
Dustin Hoffman, whose central character David Sumner journeys from meek mathematician to violent avenger during the course of the drama, told us: 'I was aware of a duplicity in myself.
There's anger in Cyrus too, though it's just one of the facets that flicker in his interpretation, which ranges from hilarious anxiety attacks that fool no one but Mom to a duplicity so taunting, sly and determined that it gives you a chill.
At the very least a duplicity will be created, and my relationship with the book (along with everyone else's) will be weakened by it.
(Kieltyka, 2006c ) he was using friendship as a context for what he wanted, there was a duplicity, there was a deception.
When Kieltyka told me she "wasn't enthusiastic" about the sexual relations charge, it was to emphasize that what she found truly unethical was what she called Bailey's "bait and switch" tactics: he was using friendship as a context for what he wanted, there was a duplicity, there was a deception.
A contemptuous duplicity, a meanness, has entered his talk on the stump — so much so that it seems obvious that, in the drive for victory, he is willing to replicate some of the same underhanded methods that defeated him eight years ago in South Carolina.
For those whom he deceived, Philby had to be made into a grandmaster of duplicity, a great and terrible genius; if he were anything less, they would seem even more careless, gullible and plain stupid than they were.
Nixon and Eisenhower shared a certain "duplicity" and came from similar parents, "devout mothers... and short-tempered fathers," but Ike was a much cooler customer, sometimes to the point of what Frank calls "casual cruelty".
And through it all she continues to delve in a disturbing duplicity, spewing lies and half-truths as she takes potshots at President Barack Obama, the man she accused of "palling around with terrorists" on the campaign trail last year.
We also reported two hepatic vascular anomalies and a renal duplicity, detected by ultrasonography.
