The quality or state of being counterfeit; the characteristic of being fake or fraudulent.
From counterfeit + -ness (suffix forming abstract nouns, from Old English -ness). Combines the adjective form with the noun-forming suffix to create an abstract quality.
Interestingly, the 'counterfeitness' of something is what people actually detect—not through logical analysis, but through subtle feelings that something is 'off,' a skill called forensic intuition.
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