During a presidential election, many politicians oppugn the ideas of the opposing party by providing proof of their wrongdoings.

Historians often present evidence of the existence of the Holocaust where many skeptics oppugn the likelihood of this historical event.

After scientists oppugn the conclusions of the study on birds, the chief researcher showed these doubters his footage from the study.

At the garage sale I would oppugn the designer purses as knock-offs since they were being sold so cheaply.

After visiting Germany a few years ago, I would oppugn any German food served to me in America due to it being so different than what was served to me overseas.