Final answer:
Paul's last comment suggests that he disagrees with the previous statement.
Step-by-step explanation:
Based on the given information, Paul's last comment suggests that he is conflicted between his own beliefs and what others around him think. The passage mentions that Paul wants to continue believing in 'b' because that is what he was brought up with and what his family and friends think. Therefore, the meaning of Paul's last comment is that he disagrees with the previous statement.