In a way that contains opposing or mutually exclusive statements; in a manner that contradicts something else.
From 'contradictory' (from Latin 'contradictorius') plus '-ly.' The root combines 'contra' (against) and 'dicere' (to speak), literally meaning to speak against.
When politicians speak 'contradictorily,' they're breaking one of logic's fundamental laws—in formal logic, two contradictory statements can never both be true, which is why contradictions are so effective in debate.
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