I was wondering what’s the correct pronunciation of “duplicacy” and since this off-topic question triggered some answers, I guess it’s time to move those into a topic of their own.
So here we go. This was my suggestion:
In my mind, the - acy is pronounced as in privacy . So that would put the emphasis on the syllable pli in duplicacy, but in some versions of English perhaps it’s also possible to ephasize the du . I’m not a native speaker…
Then Gilbert replied: