The reading passage contends that …

The professor, however, insists that …

To bolster his conclusion, he offers three specific points in the lecture, directly challenging the reading passage.

For one thing, the professor suggests that … which contradicts the belief in the passage that …

To be specific, ….

In the second place, even though the reading material asserts that … the professor argues in the lecture that …., pointing out that …

Obviously, his argument opposes its counterpart in the material.

Moreover, in accordance with the professor, … He supports his point of view with the fact that … This casts doubt on the final argument in the reading that …

In general, the speaker clearly disapproves of the view that..... She also presents the evidence successfully against the main idea.