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Use "deceptiveness" in a sentence
"The veil's deceptiveness is most clearly demonstrated in the final scene of the tale when Zelica dons the Prophet's veil, after he has poisoned his followers and killed himself in a vat of acid (which he hopes will dissolve his deformed face and preserve his legend)."
"College mates of Taylor will recall the deceptiveness of this outward appearance."
"The chief cause of his deceptiveness was the fabrication of circumstantial narrative, and the invention of exact numerical accounts."