To assert the contrary of; to oppose in words; to take issue with; to gainsay; to deny the truth of, as of a statement or a speaker; to impugn.

To be contrary to; to oppose; to resist.

To oppose in words; to gainsay; to deny, or assert the contrary of, something.

prove negative; show to be false

To tell the judge about evidence that tends to show something is not true.

be in contradiction with