What exists when a speaker tells listeners about ideas that oppose those of the speaker and speaker also refutes the opposing ideas?

This situation describes a rhetorical technique known as "counterargument" or "refutation." When a speaker presents opposing ideas and subsequently refutes them, they demonstrate an awareness of differing viewpoints and strengthen their own argument. This approach can enhance credibility and persuade listeners by addressing potential objections directly. It also shows that the speaker has thoroughly considered the topic, making their argument more robust.