Both the lecture and the reading passage deal with
The lecturer argues that
This contradicts the reading passage's claim that
First of all, in response to the reading, the lecturer says that
The speaker explains that
he says
This refutes the reading passages claim that
second, the lecturer challenges the reading by stating that
The speaker asserts that
he states that
This counters the reading passages claim that
Finally, the lecturer contests the reading passages assertion that
The speaker contends that
he mentions
This casts doubt on the reading passages claim that