aberration ambiguity artifice bias casuistry cavil deceit deception deceptiveness delusion deviation elusion equivocation erratum erroneousness error evasion falsehood faultiness flaw heresy illogicality inconsistency inexactness invalidity misapprehension miscalculation misconstrual misinterpretation mistake notion paradox perversion preconception prejudice quirk solecism sophism sophistry spuriousness subterfuge untruth non sequitur quibbling