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fallacious

fal·la·cious [ fə láyshəss ]


adjective 
Definition:
 
1. containing mistaken belief: containing or involving a mistaken belief or idea

2. deceptive: deceptive or misleading

[Early 16th century. Via Old French< Latin fallaciosus< fallacia (see fallacy)]

fal·la·cious·ly adverb
fal·la·cious·ness noun
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