The simple study of an oak or an elm tree would suffice to confute the regularity theory.
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The second was written expressly to confute the conclusions of the first.
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He immediately began to confute the Arians and wrote a treatise against their teaching, which has been lost.
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More examples
Disprove: prove to be false; "The physicist disproved his colleagues' theories"
(confutation) the speech act of refuting conclusively
In informal logic an objection (also called expostulation or refutation), is a reason arguing against a premise, lemma or main contention. An objection to an objection is known as a rebuttal.
To disprove or refute; to show something to be false or someone to be wrong