The lecture and the reading discuss ( ). The lecturer puts forward 3 pioints and effectively contradicts the opinions of the reading.
First of all, the reading says that ( ). In contrast, the lecture claims that ( ). By this way, the lecture contradicts the first opinion of the reading.
Second, the reading claims that ( ), while according to the lecture, this is not the case. The lecturer says that ( ). By casting doubt on an important peice of evidence of the reading, the lecture contradicts the second claim of the reading.
Finally, the reading states that ( ), while the lecture claims that ( ). Thus the lecture refutes the last claim of the reading.